Cosmetic changes
FIx contact match in 200 response to REGISTER

- Adapt to new JsSIP.URI style
Cosmetic change. Delete extra log lines
README updated.
s/Demo Online/Online Demo/g   Thanks to @saghul.
Added support for browsers other than Chrome
Add Copyright line to code header
New syntax for getting streams

.. according to last RTCPeerconnection API changes
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/MediaSession.js