Changed to use new object definition
Removed datachannel.js from test (it's a symlink)
Addapted for Firefox "alder"... althought it doesn't work

Why Firefox latest builds don't follow the specification? :-/
Merge branch 'master' into firefox
Merge branch 'master' into firefox

Conflicts:
	test/datachannel.js
Optimized getId()
Added documentation for latest version of WebRTC specification
Converted _createDataChannel() on a private function
Removed useless two first characters from SDP unique id
Improved DataChannel.onclose event according to specification
Converted back _createDataChannel() a private function
Converted setId() & setPeerId() on private functions
Converted _ondatachannel() on a private function
Merge branch 'master' into firefox
Updated specification to 2012-10-19
Renamed PeerConnection to RTCPeerConnection as new specification
Changing DataChannel to RTCDataChannel as new specification
Update test to new specification
Returning string about the polyfill use (native, polyfill, old browser)
Show connection errors on console