Peerjs

- Patch for 246, which started as of Chrome 38.

- Browserify build system

- Fixed a bug where `disconnected` would be emitted for XHR requests that were aborted on purpose.

- Allow an external adapter to be used (for `RTCPeerConnection` and such). (Thanks, khankuan!)
- Fixed a bug where `_chunkedData` was not being cleared recursively, causing memory to be eaten up unnecessarily. (Thanks, UnsungHero97!)
- Added `peer.reconnect()`, which allows a peer to reconnect to the signalling server with the same ID it had before after it has been disconnected. (Thanks, jure, for the amazing input :)!)
- Added previously-missing error types, such as `webrtc`, `network`, and `peer-unavailable` error types. (Thanks, mmis1000 for reporting!)
- Fixed a bug where the peer would infinitely attempt to start XHR streaming when there is no network connection available. Now, the peer will simply emit a `network` error and disconnect. (Thanks, UnsungHero97 for reporting!)

- **The following changes are only compatible with PeerServer 0.2.4.**
- Added the ability to specify a custom path when connecting to a self-hosted
PeerServer.
- Added the ability to retrieve a list of all peers connected to the server.

- Chrome 31+/Firefox 27+ DataConnection interop for files.
- Deprecate `binary-utf8` in favor of faster support for UTF8 in the regular
`binary` serialization.
- Fix `invalid-key` error message.