an icon idea
Various fixes.

GoogleMapFragment no longer ignores zoom level when switching to EXPLORE mode on null query.
Remove ActionBar. Use icons for Map, Camp, Art and Events tabs.
Tweak PlayaItemViewActivity layout. Still need to update favorite icon.
Various minor fixes.

Restrict GoogleMapFragment bounds and throttle POI search.
Persistent Search button in place of ActionBar search.

This commit contains mixmatched icons for camp and clock tab. Finalize these.