remove unused imports and fields; code formatting
mobile/user-location: Do not reload when switching between loc+sensor and loc-only
Use CSS transition for arrow rotation
Mobile: implement follow mode
Only move map when marker reaches edge
Don't start follow mode immediately
use current best location estimation from the android docs: http://developer.android.com/guide/topics/location/strategies.html#BestEstimate
Merge branch 'fkloft/user-location'