Use simpler getCenter method, remove IMapController.
Removed references to importing the AAR.
Move layout constants into interface
Merge branch 'master' of github.com:mapbox/mapbox-android-sdk
Remove unused Polyline class, document Icon
Move GeoJSON remote loading into GeoJSONLayer
Remove switchToLayer. Fixes #158

Rewrite MapBox layer. Fixes #159
Make setURL dumb/smarter. Fixes #160
merges current state of master