android: remove MapActivity

- see vtm-android-start for an example use of MapView
- add MapPreferences

- update android-start
- android-example: use appcompat actionbar

vtm-android-example/src/org/oscim/android/test/PathOverlayActivity.java

@@ -41,11 +41,17 @@ public class PathOverlayActivity extends BitmapTileMapActivity {
 
 		createLayers(1, true);
 
-		mMap.setMapPosition(0, 0, 1 << 2);
-
 		looooop();
 	}
 
+	@Override
+	protected void onResume() {
+		super.onResume();
+		/* ignore saved position */
+		mMap.setMapPosition(0, 0, 1 << 2);
+		mMapView.onResume();
+	}
+
 	void looooop() {
 		mMap.postDelayed(new Runnable() {
 			@Override