Use templating to render the community-popup html

I did quite some changes without impairing the user-experience in any way:

The html for the community-popups is now renderd using the easy and lightweight rendering engine from underscore.js. This makes the code much more maintainable a opens the door for more complex community popups.

Also i moved the all the single contact-icons to one sprite to improve load-time.

<blockquote>"Im Übrigen bin ich der Meinung, daß die ffmap in ein eigenes Repository ausgelagert werden sollte!" :-)</blockquote>