Index: frontend/node_modules/wbuf/index.js
===================================================================
--- frontend/node_modules/wbuf/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/wbuf/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,425 @@
+var assert = require('minimalistic-assert');
+var Buffer = require('buffer').Buffer;
+
+function WBuf() {
+  this.buffers = [];
+  this.toReserve = 0;
+  this.size = 0;
+  this.maxSize = 0;
+  this.avail = 0;
+
+  this.last = null;
+  this.offset = 0;
+
+  // Used in slicing
+  this.sliceQueue = null;
+
+  this.forceReserve = false;
+
+  // Mostly a constant
+  this.reserveRate = 64;
+}
+module.exports = WBuf;
+
+WBuf.prototype.reserve = function reserve(n) {
+  this.toReserve += n;
+
+  // Force reservation of extra bytes
+  if (this.forceReserve)
+    this.toReserve = Math.max(this.toReserve, this.reserveRate);
+};
+
+WBuf.prototype._ensure = function _ensure(n) {
+  if (this.avail >= n)
+    return;
+
+  if (this.toReserve === 0)
+    this.toReserve = this.reserveRate;
+
+  this.toReserve = Math.max(n - this.avail, this.toReserve);
+
+  if (this.avail === 0)
+    this._next();
+};
+
+WBuf.prototype._next = function _next() {
+  var buf;
+  if (this.sliceQueue === null) {
+    // Most common case
+    buf = new Buffer(this.toReserve);
+  } else {
+    // Only for `.slice()` results
+    buf = this.sliceQueue.shift();
+    if (this.sliceQueue.length === 0)
+      this.sliceQueue = null;
+  }
+
+  this.toReserve = 0;
+
+  this.buffers.push(buf);
+  this.avail = buf.length;
+  this.offset = 0;
+  this.last = buf;
+};
+
+WBuf.prototype._rangeCheck = function _rangeCheck() {
+  if (this.maxSize !== 0 && this.size > this.maxSize)
+    throw new RangeError('WBuf overflow');
+};
+
+WBuf.prototype._move = function _move(n) {
+  this.size += n;
+  if (this.avail === 0)
+    this.last = null;
+
+  this._rangeCheck();
+};
+
+WBuf.prototype.slice = function slice(start, end) {
+  assert(0 <= start && start <= this.size);
+  assert(0 <= end && end <= this.size);
+
+  if (this.last === null)
+    this._next();
+
+  var res = new WBuf();
+
+  // Only last chunk is requested
+  if (start >= this.size - this.offset) {
+    res.buffers.push(this.last);
+    res.last = this.last;
+    res.offset = start - this.size + this.offset;
+    res.maxSize = end - start;
+    res.avail = res.maxSize;
+
+    return res;
+  }
+
+  var startIndex = -1;
+  var startOffset = 0;
+  var endIndex = -1;
+
+  // Find buffer indices
+  var offset = 0;
+  for (var i = 0; i < this.buffers.length; i++) {
+    var buf = this.buffers[i];
+    var next = offset + buf.length;
+
+    // Found the start
+    if (start >= offset && start <= next) {
+      startIndex = i;
+      startOffset = start - offset;
+      if (endIndex !== -1)
+        break;
+    }
+    if (end >= offset && end <= next) {
+      endIndex = i;
+      if (startIndex !== -1)
+        break;
+    }
+
+    offset = next;
+  }
+
+  res.last = this.buffers[startIndex];
+  res.offset = startOffset;
+  res.maxSize = end - start;
+
+  // Multi-buffer slice
+  if (startIndex < endIndex) {
+    res.sliceQueue = this.buffers.slice(startIndex + 1, endIndex + 1);
+
+    res.last = res.last.slice(res.offset);
+    res.offset = 0;
+  }
+
+  res.avail = res.last.length - res.offset;
+  res.buffers.push(res.last);
+
+  return res;
+};
+
+WBuf.prototype.skip = function skip(n) {
+  if (n === 0)
+    return this.slice(this.size, this.size);
+
+  this._ensure(n);
+
+  var left = n;
+  while (left > 0) {
+    var toSkip = Math.min(left, this.avail);
+    left -= toSkip;
+    this.size += toSkip;
+    if (toSkip === this.avail) {
+      if (left !== 0) {
+        this._next();
+      } else {
+        this.avail -= toSkip;
+        this.offset += toSkip;
+      }
+    } else {
+      this.offset += toSkip;
+      this.avail -= toSkip;
+    }
+  }
+
+  this._rangeCheck();
+
+  return this.slice(this.size - n, this.size);
+};
+
+WBuf.prototype.write = function write(str) {
+  var len = 0;
+  for (var i = 0; i < str.length; i++) {
+    var c = str.charCodeAt(i);
+    if (c > 255)
+      len += 2;
+    else
+      len += 1;
+  }
+  this.reserve(len);
+  for (var i = 0; i < str.length; i++) {
+    var c = str.charCodeAt(i);
+    var hi = c >>> 8;
+    var lo = c & 0xff;
+
+    if (hi)
+      this.writeUInt8(hi);
+    this.writeUInt8(lo);
+  }
+};
+
+WBuf.prototype.copyFrom = function copyFrom(buf, start, end) {
+  var off = start === undefined ? 0 : start;
+  var len = end === undefined ? buf.length : end;
+  if (off === len)
+    return;
+
+  this._ensure(len - off);
+  while (off < len) {
+    var toCopy = Math.min(len - off, this.avail);
+    buf.copy(this.last, this.offset, off, off + toCopy);
+    off += toCopy;
+    this.size += toCopy;
+    if (toCopy === this.avail) {
+      if (off !== len) {
+        this._next();
+      } else {
+        this.avail = 0;
+        this.offset += toCopy;
+      }
+    } else {
+      this.offset += toCopy;
+      this.avail -= toCopy;
+    }
+  }
+
+  this._rangeCheck();
+};
+
+WBuf.prototype.writeUInt8 = function writeUInt8(v) {
+  this._ensure(1);
+
+  this.last[this.offset++] = v;
+  this.avail--;
+  this._move(1);
+};
+
+WBuf.prototype.writeUInt16BE = function writeUInt16BE(v) {
+  this._ensure(2);
+
+  // Fast case - everything fits into the last buffer
+  if (this.avail >= 2) {
+    this.last.writeUInt16BE(v, this.offset);
+    this.offset += 2;
+    this.avail -= 2;
+
+  // One byte here, one byte there
+  } else {
+    this.last[this.offset] = (v >>> 8);
+    this._next();
+    this.last[this.offset++] = v & 0xff;
+    this.avail--;
+  }
+
+  this._move(2);
+};
+
+WBuf.prototype.writeUInt24BE = function writeUInt24BE(v) {
+  this._ensure(3);
+
+  // Fast case - everything fits into the last buffer
+  if (this.avail >= 3) {
+    this.last.writeUInt16BE(v >>> 8, this.offset);
+    this.last[this.offset + 2] = v & 0xff;
+    this.offset += 3;
+    this.avail -= 3;
+    this._move(3);
+
+  // Two bytes here
+  } else if (this.avail >= 2) {
+    this.last.writeUInt16BE(v >>> 8, this.offset);
+    this._next();
+    this.last[this.offset++] = v & 0xff;
+    this.avail--;
+    this._move(3);
+
+  // Just one byte here
+  } else {
+    this.last[this.offset] = v >>> 16;
+    this._move(1);
+    this._next();
+    this.writeUInt16BE(v & 0xffff);
+  }
+};
+
+WBuf.prototype.writeUInt32BE = function writeUInt32BE(v) {
+  this._ensure(4);
+
+  // Fast case - everything fits into the last buffer
+  if (this.avail >= 4) {
+    this.last.writeUInt32BE(v, this.offset);
+    this.offset += 4;
+    this.avail -= 4;
+    this._move(4);
+
+  // Three bytes here
+  } else if (this.avail >= 3) {
+    this.writeUInt24BE(v >>> 8);
+    this._next();
+    this.last[this.offset++] = v & 0xff;
+    this.avail--;
+    this._move(1);
+
+  // Slow case, who cares
+  } else {
+    this.writeUInt16BE(v >>> 16);
+    this.writeUInt16BE(v & 0xffff);
+  }
+};
+
+WBuf.prototype.writeUInt16LE = function writeUInt16LE(num) {
+  var r = ((num & 0xff) << 8) | (num >>> 8);
+  this.writeUInt16BE(r);
+};
+
+WBuf.prototype.writeUInt24LE = function writeUInt24LE(num) {
+  var r = ((num & 0xff) << 16) | (((num >>> 8) & 0xff) << 8) | (num >>> 16);
+  this.writeUInt24BE(r);
+};
+
+WBuf.prototype.writeUInt32LE = function writeUInt32LE(num) {
+  this._ensure(4);
+
+  // Fast case - everything fits into the last buffer
+  if (this.avail >= 4) {
+    this.last.writeUInt32LE(num, this.offset);
+    this.offset += 4;
+    this.avail -= 4;
+    this._move(4);
+
+  // Three bytes here
+  } else if (this.avail >= 3) {
+    this.writeUInt24LE(num & 0xffffff);
+    this._next();
+    this.last[this.offset++] = num >>> 24;
+    this.avail--;
+    this._move(1);
+
+  // Slow case, who cares
+  } else {
+    this.writeUInt16LE(num & 0xffff);
+    this.writeUInt16LE(num >>> 16);
+  }
+};
+
+WBuf.prototype.render = function render() {
+  var left = this.size;
+  var out = [];
+
+  for (var i = 0; i < this.buffers.length && left >= 0; i++) {
+    var buf = this.buffers[i];
+    left -= buf.length;
+    if (left >= 0) {
+      out.push(buf);
+    } else {
+      out.push(buf.slice(0, buf.length + left));
+    }
+  }
+
+  return out;
+};
+
+// Signed APIs
+WBuf.prototype.writeInt8 = function writeInt8(num) {
+  if (num < 0)
+    return this.writeUInt8(0x100 + num);
+  else
+    return this.writeUInt8(num);
+};
+
+function toUnsigned16(num) {
+  if (num < 0)
+    return 0x10000 + num;
+  else
+    return num;
+}
+
+WBuf.prototype.writeInt16LE = function writeInt16LE(num) {
+  this.writeUInt16LE(toUnsigned16(num));
+};
+
+WBuf.prototype.writeInt16BE = function writeInt16BE(num) {
+  this.writeUInt16BE(toUnsigned16(num));
+};
+
+function toUnsigned24(num) {
+  if (num < 0)
+    return 0x1000000 + num;
+  else
+    return num;
+}
+
+WBuf.prototype.writeInt24LE = function writeInt24LE(num) {
+  this.writeUInt24LE(toUnsigned24(num));
+};
+
+WBuf.prototype.writeInt24BE = function writeInt24BE(num) {
+  this.writeUInt24BE(toUnsigned24(num));
+};
+
+function toUnsigned32(num) {
+  if (num < 0)
+    return (0xffffffff + num) + 1;
+  else
+    return num;
+}
+
+WBuf.prototype.writeInt32LE = function writeInt32LE(num) {
+  this.writeUInt32LE(toUnsigned32(num));
+};
+
+WBuf.prototype.writeInt32BE = function writeInt32BE(num) {
+  this.writeUInt32BE(toUnsigned32(num));
+};
+
+WBuf.prototype.writeComb = function writeComb(size, endian, value) {
+  if (size === 1)
+    return this.writeUInt8(value);
+
+  if (endian === 'le') {
+    if (size === 2)
+      this.writeUInt16LE(value);
+    else if (size === 3)
+      this.writeUInt24LE(value);
+    else if (size === 4)
+      this.writeUInt32LE(value);
+  } else {
+    if (size === 2)
+      this.writeUInt16BE(value);
+    else if (size === 3)
+      this.writeUInt24BE(value);
+    else if (size === 4)
+      this.writeUInt32BE(value);
+  }
+};