MapType: Made map fragments responsive to map type change, made map type more accessible

MapFragments:
- now notified when pref_map_type changes, map refreshed with new setting in response

Menu:
- added menu item 'Map Type' -> 'Satellite', 'Hybrid', 'Normal', 'Terrain' to FlightData and Planning activities
![screenshot_2013-10-06-14-04-30](https://f.cloud.github.com/assets/4014433/1277189/63458282-2eb2-11e3-8bc1-ea546e6105d3.png)
![screenshot_2013-10-06-14-04-36](https://f.cloud.github.com/assets/4014433/1277191/7329406c-2eb2-11e3-89a0-86ac81989dbe.png)