Full refactor of UI based on UX review

List of issues addressed:
issue #829 - UX Design Doc
 issue #795 - Move main activity stats according to Issue #829 
issue #792 - Start/Stop on main activity (@keverets already did this one)
issue #790 - Icons for cell/wifi collection
issue #789 - Make all subviews navigable from map activity screen

Issue #858 - commit 571d20a - Slow to show first fix on map view, fix by grabbing last known gps.