Change Trickle ICE page to use a table.

Try #2 to land this - the previous version got only partially committed
due to a complex commit sequence.
CR feedback

Simplify CSS.
Clarify some non-obvious things.
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
Add t=json parameter

Allow mobile clients to avoid parsing HTML.