Updated conformance tests and w3c-ified them.

I intend here to put these up for review on W3C. This moves the tests
to use the W3C-style vendor prefix handling and updates the tests to
the latest drafts.

This yields 44 Pass 24 Fail and 13 pass 54 fail 1 timeout on Firefox.
As far I can tell all failures are correct; in particular FF media
media stream tracks do not adhere to the standard.

Also I can't get FF to get a remote video up in the peerconnection
test, just the local one.

BUG=webrtc:3455
R=kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/14639004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6370 4adac7df-926f-26a2-2b94-8c16560cd09d