Index: frontend/node_modules/prelude-ls/lib/Func.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/Func.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/Func.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,69 @@
+// Generated by LiveScript 1.6.0
+var apply, curry, flip, fix, over, memoize, toString$ = {}.toString;
+apply = curry$(function(f, list){
+  return f.apply(null, list);
+});
+curry = function(f){
+  return curry$(f);
+};
+flip = curry$(function(f, x, y){
+  return f(y, x);
+});
+fix = function(f){
+  return function(g){
+    return function(){
+      return f(g(g)).apply(null, arguments);
+    };
+  }(function(g){
+    return function(){
+      return f(g(g)).apply(null, arguments);
+    };
+  });
+};
+over = curry$(function(f, g, x, y){
+  return f(g(x), g(y));
+});
+memoize = function(f){
+  var memo;
+  memo = {};
+  return function(){
+    var args, res$, i$, to$, key, arg;
+    res$ = [];
+    for (i$ = 0, to$ = arguments.length; i$ < to$; ++i$) {
+      res$.push(arguments[i$]);
+    }
+    args = res$;
+    key = (function(){
+      var i$, ref$, len$, results$ = [];
+      for (i$ = 0, len$ = (ref$ = args).length; i$ < len$; ++i$) {
+        arg = ref$[i$];
+        results$.push(arg + toString$.call(arg).slice(8, -1));
+      }
+      return results$;
+    }()).join('');
+    return memo[key] = key in memo
+      ? memo[key]
+      : f.apply(null, args);
+  };
+};
+module.exports = {
+  curry: curry,
+  flip: flip,
+  fix: fix,
+  apply: apply,
+  over: over,
+  memoize: memoize
+};
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}
Index: frontend/node_modules/prelude-ls/lib/List.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/List.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/List.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,716 @@
+// Generated by LiveScript 1.6.0
+var each, map, compact, filter, reject, remove, partition, find, head, first, tail, last, initial, empty, reverse, unique, uniqueBy, fold, foldl, fold1, foldl1, foldr, foldr1, unfoldr, concat, concatMap, flatten, difference, intersection, union, countBy, groupBy, andList, orList, any, all, sort, sortWith, sortBy, sum, product, mean, average, maximum, minimum, maximumBy, minimumBy, scan, scanl, scan1, scanl1, scanr, scanr1, slice, take, drop, splitAt, takeWhile, dropWhile, span, breakList, zip, zipWith, zipAll, zipAllWith, at, elemIndex, elemIndices, findIndex, findIndices, toString$ = {}.toString;
+each = curry$(function(f, xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    f(x);
+  }
+  return xs;
+});
+map = curry$(function(f, xs){
+  var i$, len$, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    results$.push(f(x));
+  }
+  return results$;
+});
+compact = function(xs){
+  var i$, len$, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (x) {
+      results$.push(x);
+    }
+  }
+  return results$;
+};
+filter = curry$(function(f, xs){
+  var i$, len$, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (f(x)) {
+      results$.push(x);
+    }
+  }
+  return results$;
+});
+reject = curry$(function(f, xs){
+  var i$, len$, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (!f(x)) {
+      results$.push(x);
+    }
+  }
+  return results$;
+});
+remove = curry$(function(el, xs){
+  var i, x$;
+  i = elemIndex(el, xs);
+  x$ = xs.slice();
+  if (i != null) {
+    x$.splice(i, 1);
+  }
+  return x$;
+});
+partition = curry$(function(f, xs){
+  var passed, failed, i$, len$, x;
+  passed = [];
+  failed = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    (f(x) ? passed : failed).push(x);
+  }
+  return [passed, failed];
+});
+find = curry$(function(f, xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (f(x)) {
+      return x;
+    }
+  }
+});
+head = first = function(xs){
+  return xs[0];
+};
+tail = function(xs){
+  if (!xs.length) {
+    return;
+  }
+  return xs.slice(1);
+};
+last = function(xs){
+  return xs[xs.length - 1];
+};
+initial = function(xs){
+  if (!xs.length) {
+    return;
+  }
+  return xs.slice(0, -1);
+};
+empty = function(xs){
+  return !xs.length;
+};
+reverse = function(xs){
+  return xs.concat().reverse();
+};
+unique = function(xs){
+  var result, i$, len$, x;
+  result = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (!in$(x, result)) {
+      result.push(x);
+    }
+  }
+  return result;
+};
+uniqueBy = curry$(function(f, xs){
+  var seen, i$, len$, x, val, results$ = [];
+  seen = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    val = f(x);
+    if (in$(val, seen)) {
+      continue;
+    }
+    seen.push(val);
+    results$.push(x);
+  }
+  return results$;
+});
+fold = foldl = curry$(function(f, memo, xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    memo = f(memo, x);
+  }
+  return memo;
+});
+fold1 = foldl1 = curry$(function(f, xs){
+  return fold(f, xs[0], xs.slice(1));
+});
+foldr = curry$(function(f, memo, xs){
+  var i$, x;
+  for (i$ = xs.length - 1; i$ >= 0; --i$) {
+    x = xs[i$];
+    memo = f(x, memo);
+  }
+  return memo;
+});
+foldr1 = curry$(function(f, xs){
+  return foldr(f, xs[xs.length - 1], xs.slice(0, -1));
+});
+unfoldr = curry$(function(f, b){
+  var result, x, that;
+  result = [];
+  x = b;
+  while ((that = f(x)) != null) {
+    result.push(that[0]);
+    x = that[1];
+  }
+  return result;
+});
+concat = function(xss){
+  return [].concat.apply([], xss);
+};
+concatMap = curry$(function(f, xs){
+  var x;
+  return [].concat.apply([], (function(){
+    var i$, ref$, len$, results$ = [];
+    for (i$ = 0, len$ = (ref$ = xs).length; i$ < len$; ++i$) {
+      x = ref$[i$];
+      results$.push(f(x));
+    }
+    return results$;
+  }()));
+});
+flatten = function(xs){
+  var x;
+  return [].concat.apply([], (function(){
+    var i$, ref$, len$, results$ = [];
+    for (i$ = 0, len$ = (ref$ = xs).length; i$ < len$; ++i$) {
+      x = ref$[i$];
+      if (toString$.call(x).slice(8, -1) === 'Array') {
+        results$.push(flatten(x));
+      } else {
+        results$.push(x);
+      }
+    }
+    return results$;
+  }()));
+};
+difference = function(xs){
+  var yss, res$, i$, to$, results, len$, x, j$, len1$, ys;
+  res$ = [];
+  for (i$ = 1, to$ = arguments.length; i$ < to$; ++i$) {
+    res$.push(arguments[i$]);
+  }
+  yss = res$;
+  results = [];
+  outer: for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    for (j$ = 0, len1$ = yss.length; j$ < len1$; ++j$) {
+      ys = yss[j$];
+      if (in$(x, ys)) {
+        continue outer;
+      }
+    }
+    results.push(x);
+  }
+  return results;
+};
+intersection = function(xs){
+  var yss, res$, i$, to$, results, len$, x, j$, len1$, ys;
+  res$ = [];
+  for (i$ = 1, to$ = arguments.length; i$ < to$; ++i$) {
+    res$.push(arguments[i$]);
+  }
+  yss = res$;
+  results = [];
+  outer: for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    for (j$ = 0, len1$ = yss.length; j$ < len1$; ++j$) {
+      ys = yss[j$];
+      if (!in$(x, ys)) {
+        continue outer;
+      }
+    }
+    results.push(x);
+  }
+  return results;
+};
+union = function(){
+  var xss, res$, i$, to$, results, len$, xs, j$, len1$, x;
+  res$ = [];
+  for (i$ = 0, to$ = arguments.length; i$ < to$; ++i$) {
+    res$.push(arguments[i$]);
+  }
+  xss = res$;
+  results = [];
+  for (i$ = 0, len$ = xss.length; i$ < len$; ++i$) {
+    xs = xss[i$];
+    for (j$ = 0, len1$ = xs.length; j$ < len1$; ++j$) {
+      x = xs[j$];
+      if (!in$(x, results)) {
+        results.push(x);
+      }
+    }
+  }
+  return results;
+};
+countBy = curry$(function(f, xs){
+  var results, i$, len$, x, key;
+  results = {};
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    key = f(x);
+    if (key in results) {
+      results[key] += 1;
+    } else {
+      results[key] = 1;
+    }
+  }
+  return results;
+});
+groupBy = curry$(function(f, xs){
+  var results, i$, len$, x, key;
+  results = {};
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    key = f(x);
+    if (key in results) {
+      results[key].push(x);
+    } else {
+      results[key] = [x];
+    }
+  }
+  return results;
+});
+andList = function(xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (!x) {
+      return false;
+    }
+  }
+  return true;
+};
+orList = function(xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (x) {
+      return true;
+    }
+  }
+  return false;
+};
+any = curry$(function(f, xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (f(x)) {
+      return true;
+    }
+  }
+  return false;
+});
+all = curry$(function(f, xs){
+  var i$, len$, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    if (!f(x)) {
+      return false;
+    }
+  }
+  return true;
+});
+sort = function(xs){
+  return xs.concat().sort(function(x, y){
+    if (x > y) {
+      return 1;
+    } else if (x < y) {
+      return -1;
+    } else {
+      return 0;
+    }
+  });
+};
+sortWith = curry$(function(f, xs){
+  return xs.concat().sort(f);
+});
+sortBy = curry$(function(f, xs){
+  return xs.concat().sort(function(x, y){
+    if (f(x) > f(y)) {
+      return 1;
+    } else if (f(x) < f(y)) {
+      return -1;
+    } else {
+      return 0;
+    }
+  });
+});
+sum = function(xs){
+  var result, i$, len$, x;
+  result = 0;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    result += x;
+  }
+  return result;
+};
+product = function(xs){
+  var result, i$, len$, x;
+  result = 1;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    result *= x;
+  }
+  return result;
+};
+mean = average = function(xs){
+  var sum, i$, len$, x;
+  sum = 0;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    x = xs[i$];
+    sum += x;
+  }
+  return sum / xs.length;
+};
+maximum = function(xs){
+  var max, i$, ref$, len$, x;
+  max = xs[0];
+  for (i$ = 0, len$ = (ref$ = xs.slice(1)).length; i$ < len$; ++i$) {
+    x = ref$[i$];
+    if (x > max) {
+      max = x;
+    }
+  }
+  return max;
+};
+minimum = function(xs){
+  var min, i$, ref$, len$, x;
+  min = xs[0];
+  for (i$ = 0, len$ = (ref$ = xs.slice(1)).length; i$ < len$; ++i$) {
+    x = ref$[i$];
+    if (x < min) {
+      min = x;
+    }
+  }
+  return min;
+};
+maximumBy = curry$(function(f, xs){
+  var max, i$, ref$, len$, x;
+  max = xs[0];
+  for (i$ = 0, len$ = (ref$ = xs.slice(1)).length; i$ < len$; ++i$) {
+    x = ref$[i$];
+    if (f(x) > f(max)) {
+      max = x;
+    }
+  }
+  return max;
+});
+minimumBy = curry$(function(f, xs){
+  var min, i$, ref$, len$, x;
+  min = xs[0];
+  for (i$ = 0, len$ = (ref$ = xs.slice(1)).length; i$ < len$; ++i$) {
+    x = ref$[i$];
+    if (f(x) < f(min)) {
+      min = x;
+    }
+  }
+  return min;
+});
+scan = scanl = curry$(function(f, memo, xs){
+  var last, x;
+  last = memo;
+  return [memo].concat((function(){
+    var i$, ref$, len$, results$ = [];
+    for (i$ = 0, len$ = (ref$ = xs).length; i$ < len$; ++i$) {
+      x = ref$[i$];
+      results$.push(last = f(last, x));
+    }
+    return results$;
+  }()));
+});
+scan1 = scanl1 = curry$(function(f, xs){
+  if (!xs.length) {
+    return;
+  }
+  return scan(f, xs[0], xs.slice(1));
+});
+scanr = curry$(function(f, memo, xs){
+  xs = xs.concat().reverse();
+  return scan(f, memo, xs).reverse();
+});
+scanr1 = curry$(function(f, xs){
+  if (!xs.length) {
+    return;
+  }
+  xs = xs.concat().reverse();
+  return scan(f, xs[0], xs.slice(1)).reverse();
+});
+slice = curry$(function(x, y, xs){
+  return xs.slice(x, y);
+});
+take = curry$(function(n, xs){
+  if (n <= 0) {
+    return xs.slice(0, 0);
+  } else {
+    return xs.slice(0, n);
+  }
+});
+drop = curry$(function(n, xs){
+  if (n <= 0) {
+    return xs;
+  } else {
+    return xs.slice(n);
+  }
+});
+splitAt = curry$(function(n, xs){
+  return [take(n, xs), drop(n, xs)];
+});
+takeWhile = curry$(function(p, xs){
+  var len, i;
+  len = xs.length;
+  if (!len) {
+    return xs;
+  }
+  i = 0;
+  while (i < len && p(xs[i])) {
+    i += 1;
+  }
+  return xs.slice(0, i);
+});
+dropWhile = curry$(function(p, xs){
+  var len, i;
+  len = xs.length;
+  if (!len) {
+    return xs;
+  }
+  i = 0;
+  while (i < len && p(xs[i])) {
+    i += 1;
+  }
+  return xs.slice(i);
+});
+span = curry$(function(p, xs){
+  return [takeWhile(p, xs), dropWhile(p, xs)];
+});
+breakList = curry$(function(p, xs){
+  return span(compose$(p, not$), xs);
+});
+zip = curry$(function(xs, ys){
+  var result, len, i$, len$, i, x;
+  result = [];
+  len = ys.length;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (i === len) {
+      break;
+    }
+    result.push([x, ys[i]]);
+  }
+  return result;
+});
+zipWith = curry$(function(f, xs, ys){
+  var result, len, i$, len$, i, x;
+  result = [];
+  len = ys.length;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (i === len) {
+      break;
+    }
+    result.push(f(x, ys[i]));
+  }
+  return result;
+});
+zipAll = function(){
+  var xss, res$, i$, to$, minLength, len$, xs, ref$, i, lresult$, j$, results$ = [];
+  res$ = [];
+  for (i$ = 0, to$ = arguments.length; i$ < to$; ++i$) {
+    res$.push(arguments[i$]);
+  }
+  xss = res$;
+  minLength = undefined;
+  for (i$ = 0, len$ = xss.length; i$ < len$; ++i$) {
+    xs = xss[i$];
+    minLength <= (ref$ = xs.length) || (minLength = ref$);
+  }
+  for (i$ = 0; i$ < minLength; ++i$) {
+    i = i$;
+    lresult$ = [];
+    for (j$ = 0, len$ = xss.length; j$ < len$; ++j$) {
+      xs = xss[j$];
+      lresult$.push(xs[i]);
+    }
+    results$.push(lresult$);
+  }
+  return results$;
+};
+zipAllWith = function(f){
+  var xss, res$, i$, to$, minLength, len$, xs, ref$, i, results$ = [];
+  res$ = [];
+  for (i$ = 1, to$ = arguments.length; i$ < to$; ++i$) {
+    res$.push(arguments[i$]);
+  }
+  xss = res$;
+  minLength = undefined;
+  for (i$ = 0, len$ = xss.length; i$ < len$; ++i$) {
+    xs = xss[i$];
+    minLength <= (ref$ = xs.length) || (minLength = ref$);
+  }
+  for (i$ = 0; i$ < minLength; ++i$) {
+    i = i$;
+    results$.push(f.apply(null, (fn$())));
+  }
+  return results$;
+  function fn$(){
+    var i$, ref$, len$, results$ = [];
+    for (i$ = 0, len$ = (ref$ = xss).length; i$ < len$; ++i$) {
+      xs = ref$[i$];
+      results$.push(xs[i]);
+    }
+    return results$;
+  }
+};
+at = curry$(function(n, xs){
+  if (n < 0) {
+    return xs[xs.length + n];
+  } else {
+    return xs[n];
+  }
+});
+elemIndex = curry$(function(el, xs){
+  var i$, len$, i, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (x === el) {
+      return i;
+    }
+  }
+});
+elemIndices = curry$(function(el, xs){
+  var i$, len$, i, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (x === el) {
+      results$.push(i);
+    }
+  }
+  return results$;
+});
+findIndex = curry$(function(f, xs){
+  var i$, len$, i, x;
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (f(x)) {
+      return i;
+    }
+  }
+});
+findIndices = curry$(function(f, xs){
+  var i$, len$, i, x, results$ = [];
+  for (i$ = 0, len$ = xs.length; i$ < len$; ++i$) {
+    i = i$;
+    x = xs[i$];
+    if (f(x)) {
+      results$.push(i);
+    }
+  }
+  return results$;
+});
+module.exports = {
+  each: each,
+  map: map,
+  filter: filter,
+  compact: compact,
+  reject: reject,
+  remove: remove,
+  partition: partition,
+  find: find,
+  head: head,
+  first: first,
+  tail: tail,
+  last: last,
+  initial: initial,
+  empty: empty,
+  reverse: reverse,
+  difference: difference,
+  intersection: intersection,
+  union: union,
+  countBy: countBy,
+  groupBy: groupBy,
+  fold: fold,
+  fold1: fold1,
+  foldl: foldl,
+  foldl1: foldl1,
+  foldr: foldr,
+  foldr1: foldr1,
+  unfoldr: unfoldr,
+  andList: andList,
+  orList: orList,
+  any: any,
+  all: all,
+  unique: unique,
+  uniqueBy: uniqueBy,
+  sort: sort,
+  sortWith: sortWith,
+  sortBy: sortBy,
+  sum: sum,
+  product: product,
+  mean: mean,
+  average: average,
+  concat: concat,
+  concatMap: concatMap,
+  flatten: flatten,
+  maximum: maximum,
+  minimum: minimum,
+  maximumBy: maximumBy,
+  minimumBy: minimumBy,
+  scan: scan,
+  scan1: scan1,
+  scanl: scanl,
+  scanl1: scanl1,
+  scanr: scanr,
+  scanr1: scanr1,
+  slice: slice,
+  take: take,
+  drop: drop,
+  splitAt: splitAt,
+  takeWhile: takeWhile,
+  dropWhile: dropWhile,
+  span: span,
+  breakList: breakList,
+  zip: zip,
+  zipWith: zipWith,
+  zipAll: zipAll,
+  zipAllWith: zipAllWith,
+  at: at,
+  elemIndex: elemIndex,
+  elemIndices: elemIndices,
+  findIndex: findIndex,
+  findIndices: findIndices
+};
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}
+function in$(x, xs){
+  var i = -1, l = xs.length >>> 0;
+  while (++i < l) if (x === xs[i]) return true;
+  return false;
+}
+function compose$() {
+  var functions = arguments;
+  return function() {
+    var i, result;
+    result = functions[0].apply(this, arguments);
+    for (i = 1; i < functions.length; ++i) {
+      result = functions[i](result);
+    }
+    return result;
+  };
+}
+function not$(x){ return !x; }
Index: frontend/node_modules/prelude-ls/lib/Num.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/Num.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/Num.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,130 @@
+// Generated by LiveScript 1.6.0
+var max, min, negate, abs, signum, quot, rem, div, mod, recip, pi, tau, exp, sqrt, ln, pow, sin, tan, cos, asin, acos, atan, atan2, truncate, round, ceiling, floor, isItNaN, even, odd, gcd, lcm;
+max = curry$(function(x$, y$){
+  return x$ > y$ ? x$ : y$;
+});
+min = curry$(function(x$, y$){
+  return x$ < y$ ? x$ : y$;
+});
+negate = function(x){
+  return -x;
+};
+abs = Math.abs;
+signum = function(x){
+  if (x < 0) {
+    return -1;
+  } else if (x > 0) {
+    return 1;
+  } else {
+    return 0;
+  }
+};
+quot = curry$(function(x, y){
+  return ~~(x / y);
+});
+rem = curry$(function(x$, y$){
+  return x$ % y$;
+});
+div = curry$(function(x, y){
+  return Math.floor(x / y);
+});
+mod = curry$(function(x$, y$){
+  var ref$;
+  return ((x$) % (ref$ = y$) + ref$) % ref$;
+});
+recip = (function(it){
+  return 1 / it;
+});
+pi = Math.PI;
+tau = pi * 2;
+exp = Math.exp;
+sqrt = Math.sqrt;
+ln = Math.log;
+pow = curry$(function(x$, y$){
+  return Math.pow(x$, y$);
+});
+sin = Math.sin;
+tan = Math.tan;
+cos = Math.cos;
+asin = Math.asin;
+acos = Math.acos;
+atan = Math.atan;
+atan2 = curry$(function(x, y){
+  return Math.atan2(x, y);
+});
+truncate = function(x){
+  return ~~x;
+};
+round = Math.round;
+ceiling = Math.ceil;
+floor = Math.floor;
+isItNaN = function(x){
+  return x !== x;
+};
+even = function(x){
+  return x % 2 === 0;
+};
+odd = function(x){
+  return x % 2 !== 0;
+};
+gcd = curry$(function(x, y){
+  var z;
+  x = Math.abs(x);
+  y = Math.abs(y);
+  while (y !== 0) {
+    z = x % y;
+    x = y;
+    y = z;
+  }
+  return x;
+});
+lcm = curry$(function(x, y){
+  return Math.abs(Math.floor(x / gcd(x, y) * y));
+});
+module.exports = {
+  max: max,
+  min: min,
+  negate: negate,
+  abs: abs,
+  signum: signum,
+  quot: quot,
+  rem: rem,
+  div: div,
+  mod: mod,
+  recip: recip,
+  pi: pi,
+  tau: tau,
+  exp: exp,
+  sqrt: sqrt,
+  ln: ln,
+  pow: pow,
+  sin: sin,
+  tan: tan,
+  cos: cos,
+  acos: acos,
+  asin: asin,
+  atan: atan,
+  atan2: atan2,
+  truncate: truncate,
+  round: round,
+  ceiling: ceiling,
+  floor: floor,
+  isItNaN: isItNaN,
+  even: even,
+  odd: odd,
+  gcd: gcd,
+  lcm: lcm
+};
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}
Index: frontend/node_modules/prelude-ls/lib/Obj.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/Obj.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/Obj.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,154 @@
+// Generated by LiveScript 1.6.0
+var values, keys, pairsToObj, objToPairs, listsToObj, objToLists, empty, each, map, compact, filter, reject, partition, find;
+values = function(object){
+  var i$, x, results$ = [];
+  for (i$ in object) {
+    x = object[i$];
+    results$.push(x);
+  }
+  return results$;
+};
+keys = function(object){
+  var x, results$ = [];
+  for (x in object) {
+    results$.push(x);
+  }
+  return results$;
+};
+pairsToObj = function(object){
+  var i$, len$, x, resultObj$ = {};
+  for (i$ = 0, len$ = object.length; i$ < len$; ++i$) {
+    x = object[i$];
+    resultObj$[x[0]] = x[1];
+  }
+  return resultObj$;
+};
+objToPairs = function(object){
+  var key, value, results$ = [];
+  for (key in object) {
+    value = object[key];
+    results$.push([key, value]);
+  }
+  return results$;
+};
+listsToObj = curry$(function(keys, values){
+  var i$, len$, i, key, resultObj$ = {};
+  for (i$ = 0, len$ = keys.length; i$ < len$; ++i$) {
+    i = i$;
+    key = keys[i$];
+    resultObj$[key] = values[i];
+  }
+  return resultObj$;
+});
+objToLists = function(object){
+  var keys, values, key, value;
+  keys = [];
+  values = [];
+  for (key in object) {
+    value = object[key];
+    keys.push(key);
+    values.push(value);
+  }
+  return [keys, values];
+};
+empty = function(object){
+  var x;
+  for (x in object) {
+    return false;
+  }
+  return true;
+};
+each = curry$(function(f, object){
+  var i$, x;
+  for (i$ in object) {
+    x = object[i$];
+    f(x);
+  }
+  return object;
+});
+map = curry$(function(f, object){
+  var k, x, resultObj$ = {};
+  for (k in object) {
+    x = object[k];
+    resultObj$[k] = f(x);
+  }
+  return resultObj$;
+});
+compact = function(object){
+  var k, x, resultObj$ = {};
+  for (k in object) {
+    x = object[k];
+    if (x) {
+      resultObj$[k] = x;
+    }
+  }
+  return resultObj$;
+};
+filter = curry$(function(f, object){
+  var k, x, resultObj$ = {};
+  for (k in object) {
+    x = object[k];
+    if (f(x)) {
+      resultObj$[k] = x;
+    }
+  }
+  return resultObj$;
+});
+reject = curry$(function(f, object){
+  var k, x, resultObj$ = {};
+  for (k in object) {
+    x = object[k];
+    if (!f(x)) {
+      resultObj$[k] = x;
+    }
+  }
+  return resultObj$;
+});
+partition = curry$(function(f, object){
+  var passed, failed, k, x;
+  passed = {};
+  failed = {};
+  for (k in object) {
+    x = object[k];
+    (f(x) ? passed : failed)[k] = x;
+  }
+  return [passed, failed];
+});
+find = curry$(function(f, object){
+  var i$, x;
+  for (i$ in object) {
+    x = object[i$];
+    if (f(x)) {
+      return x;
+    }
+  }
+});
+module.exports = {
+  values: values,
+  keys: keys,
+  pairsToObj: pairsToObj,
+  objToPairs: objToPairs,
+  listsToObj: listsToObj,
+  objToLists: objToLists,
+  empty: empty,
+  each: each,
+  map: map,
+  filter: filter,
+  compact: compact,
+  reject: reject,
+  partition: partition,
+  find: find
+};
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}
Index: frontend/node_modules/prelude-ls/lib/Str.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/Str.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/Str.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,92 @@
+// Generated by LiveScript 1.6.0
+var split, join, lines, unlines, words, unwords, chars, unchars, reverse, repeat, capitalize, camelize, dasherize;
+split = curry$(function(sep, str){
+  return str.split(sep);
+});
+join = curry$(function(sep, xs){
+  return xs.join(sep);
+});
+lines = function(str){
+  if (!str.length) {
+    return [];
+  }
+  return str.split('\n');
+};
+unlines = function(it){
+  return it.join('\n');
+};
+words = function(str){
+  if (!str.length) {
+    return [];
+  }
+  return str.split(/[ ]+/);
+};
+unwords = function(it){
+  return it.join(' ');
+};
+chars = function(it){
+  return it.split('');
+};
+unchars = function(it){
+  return it.join('');
+};
+reverse = function(str){
+  return str.split('').reverse().join('');
+};
+repeat = curry$(function(n, str){
+  var result, i$;
+  result = '';
+  for (i$ = 0; i$ < n; ++i$) {
+    result += str;
+  }
+  return result;
+});
+capitalize = function(str){
+  return str.charAt(0).toUpperCase() + str.slice(1);
+};
+camelize = function(it){
+  return it.replace(/[-_]+(.)?/g, function(arg$, c){
+    return (c != null ? c : '').toUpperCase();
+  });
+};
+dasherize = function(str){
+  return str.replace(/([^-A-Z])([A-Z]+)/g, function(arg$, lower, upper){
+    return lower + "-" + (upper.length > 1
+      ? upper
+      : upper.toLowerCase());
+  }).replace(/^([A-Z]+)/, function(arg$, upper){
+    if (upper.length > 1) {
+      return upper + "-";
+    } else {
+      return upper.toLowerCase();
+    }
+  });
+};
+module.exports = {
+  split: split,
+  join: join,
+  lines: lines,
+  unlines: unlines,
+  words: words,
+  unwords: unwords,
+  chars: chars,
+  unchars: unchars,
+  reverse: reverse,
+  repeat: repeat,
+  capitalize: capitalize,
+  camelize: camelize,
+  dasherize: dasherize
+};
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}
Index: frontend/node_modules/prelude-ls/lib/index.js
===================================================================
--- frontend/node_modules/prelude-ls/lib/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/prelude-ls/lib/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,178 @@
+// Generated by LiveScript 1.6.0
+var Func, List, Obj, Str, Num, id, isType, replicate, prelude, toString$ = {}.toString;
+Func = require('./Func.js');
+List = require('./List.js');
+Obj = require('./Obj.js');
+Str = require('./Str.js');
+Num = require('./Num.js');
+id = function(x){
+  return x;
+};
+isType = curry$(function(type, x){
+  return toString$.call(x).slice(8, -1) === type;
+});
+replicate = curry$(function(n, x){
+  var i$, results$ = [];
+  for (i$ = 0; i$ < n; ++i$) {
+    results$.push(x);
+  }
+  return results$;
+});
+Str.empty = List.empty;
+Str.slice = List.slice;
+Str.take = List.take;
+Str.drop = List.drop;
+Str.splitAt = List.splitAt;
+Str.takeWhile = List.takeWhile;
+Str.dropWhile = List.dropWhile;
+Str.span = List.span;
+Str.breakStr = List.breakList;
+prelude = {
+  Func: Func,
+  List: List,
+  Obj: Obj,
+  Str: Str,
+  Num: Num,
+  id: id,
+  isType: isType,
+  replicate: replicate
+};
+prelude.each = List.each;
+prelude.map = List.map;
+prelude.filter = List.filter;
+prelude.compact = List.compact;
+prelude.reject = List.reject;
+prelude.partition = List.partition;
+prelude.find = List.find;
+prelude.head = List.head;
+prelude.first = List.first;
+prelude.tail = List.tail;
+prelude.last = List.last;
+prelude.initial = List.initial;
+prelude.empty = List.empty;
+prelude.reverse = List.reverse;
+prelude.difference = List.difference;
+prelude.intersection = List.intersection;
+prelude.union = List.union;
+prelude.countBy = List.countBy;
+prelude.groupBy = List.groupBy;
+prelude.fold = List.fold;
+prelude.foldl = List.foldl;
+prelude.fold1 = List.fold1;
+prelude.foldl1 = List.foldl1;
+prelude.foldr = List.foldr;
+prelude.foldr1 = List.foldr1;
+prelude.unfoldr = List.unfoldr;
+prelude.andList = List.andList;
+prelude.orList = List.orList;
+prelude.any = List.any;
+prelude.all = List.all;
+prelude.unique = List.unique;
+prelude.uniqueBy = List.uniqueBy;
+prelude.sort = List.sort;
+prelude.sortWith = List.sortWith;
+prelude.sortBy = List.sortBy;
+prelude.sum = List.sum;
+prelude.product = List.product;
+prelude.mean = List.mean;
+prelude.average = List.average;
+prelude.concat = List.concat;
+prelude.concatMap = List.concatMap;
+prelude.flatten = List.flatten;
+prelude.maximum = List.maximum;
+prelude.minimum = List.minimum;
+prelude.maximumBy = List.maximumBy;
+prelude.minimumBy = List.minimumBy;
+prelude.scan = List.scan;
+prelude.scanl = List.scanl;
+prelude.scan1 = List.scan1;
+prelude.scanl1 = List.scanl1;
+prelude.scanr = List.scanr;
+prelude.scanr1 = List.scanr1;
+prelude.slice = List.slice;
+prelude.take = List.take;
+prelude.drop = List.drop;
+prelude.splitAt = List.splitAt;
+prelude.takeWhile = List.takeWhile;
+prelude.dropWhile = List.dropWhile;
+prelude.span = List.span;
+prelude.breakList = List.breakList;
+prelude.zip = List.zip;
+prelude.zipWith = List.zipWith;
+prelude.zipAll = List.zipAll;
+prelude.zipAllWith = List.zipAllWith;
+prelude.at = List.at;
+prelude.elemIndex = List.elemIndex;
+prelude.elemIndices = List.elemIndices;
+prelude.findIndex = List.findIndex;
+prelude.findIndices = List.findIndices;
+prelude.apply = Func.apply;
+prelude.curry = Func.curry;
+prelude.flip = Func.flip;
+prelude.fix = Func.fix;
+prelude.over = Func.over;
+prelude.split = Str.split;
+prelude.join = Str.join;
+prelude.lines = Str.lines;
+prelude.unlines = Str.unlines;
+prelude.words = Str.words;
+prelude.unwords = Str.unwords;
+prelude.chars = Str.chars;
+prelude.unchars = Str.unchars;
+prelude.repeat = Str.repeat;
+prelude.capitalize = Str.capitalize;
+prelude.camelize = Str.camelize;
+prelude.dasherize = Str.dasherize;
+prelude.values = Obj.values;
+prelude.keys = Obj.keys;
+prelude.pairsToObj = Obj.pairsToObj;
+prelude.objToPairs = Obj.objToPairs;
+prelude.listsToObj = Obj.listsToObj;
+prelude.objToLists = Obj.objToLists;
+prelude.max = Num.max;
+prelude.min = Num.min;
+prelude.negate = Num.negate;
+prelude.abs = Num.abs;
+prelude.signum = Num.signum;
+prelude.quot = Num.quot;
+prelude.rem = Num.rem;
+prelude.div = Num.div;
+prelude.mod = Num.mod;
+prelude.recip = Num.recip;
+prelude.pi = Num.pi;
+prelude.tau = Num.tau;
+prelude.exp = Num.exp;
+prelude.sqrt = Num.sqrt;
+prelude.ln = Num.ln;
+prelude.pow = Num.pow;
+prelude.sin = Num.sin;
+prelude.tan = Num.tan;
+prelude.cos = Num.cos;
+prelude.acos = Num.acos;
+prelude.asin = Num.asin;
+prelude.atan = Num.atan;
+prelude.atan2 = Num.atan2;
+prelude.truncate = Num.truncate;
+prelude.round = Num.round;
+prelude.ceiling = Num.ceiling;
+prelude.floor = Num.floor;
+prelude.isItNaN = Num.isItNaN;
+prelude.even = Num.even;
+prelude.odd = Num.odd;
+prelude.gcd = Num.gcd;
+prelude.lcm = Num.lcm;
+prelude.VERSION = '1.2.1';
+module.exports = prelude;
+function curry$(f, bound){
+  var context,
+  _curry = function(args) {
+    return f.length > 1 ? function(){
+      var params = args ? args.concat() : [];
+      context = bound ? context || this : this;
+      return params.push.apply(params, arguments) <
+          f.length && arguments.length ?
+        _curry.call(context, params) : f.apply(context, params);
+    } : f;
+  };
+  return _curry();
+}