Move to ARC, remove old `Marker` and `MapView` API's

[hansemannn]

Ok, it's about time for a 3.0.0 release! Here is the todo-list:

• [x] Move whole project to ARC (automatic reference counting)
• [x] Remove Marker API (deprecated in 2.2.0 in favor of Annotation)
• [x] Remove MapView API (deprecated in 2.2.0 in favor of View)
• [x] Remove deprecated (replaced) events (markerinfoclick, markerclick, longpress, camerachange willmove)
• [x] Remove addMarker, addMarkers, removeMarker, setCamera, getSelectedMarker, selectMarker, deselectMarker

[hansemannn]

Fixed in 3.0.0