AppRTC: touch-enable &ssr=true.

This makes &ssr=true usable on Chrome/Android.
AppRTC: touch-enable &ssr=true and make full-screen better on mobile.

This makes Chrome/Android work well both with/without ssr=true and in/out of
full-screen.
remove debugging log
moar juberti comments addressed
Merge pull request #49 from GoogleChrome/fischman-mobile-ssr

AppRTC: touch-enable &ssr=true and make full-screen better on mobile.