AppRTC speed + default HD

Turn on HD by default on Chrome desktop.
Turn on improved BWE by default.
Allow the start bitrate to be set from a URL param.
Allow the ICE transports value to be set from a URL param.
Speed up the call connect transition.
Rewrite a bunch of SDP-munging JS to be simpler.
Clean up transitions, clamp initial rate to max.

Speed up the initial fade-in from 2s to 1s.
Don’t bother fading in the PIP when doing the flip.
Remove the timer that only hooked up the PIP halfway through, now that
Chrome handles backfaces properly.
Change the remaining timers to throw away the video on the backfaces
once the flip is complete.
Rework the case-insensitive fineLine search.
Clamp start bitrate to max bitrate.
Add the connect time to the infoDiv.
Add TODO
Update infoDiv immediately upon connect
search -> indexOf
Merge pull request #24 from juberti/apprtc4

AppRTC speed + default HD