opensciencemap/vtm — pull request #59 by hanchao (2014-04-03 14:22:18+00:00)
Title: Add mbtiles tilesource in vtm-android

Test Code
```
MBTileSource tileSource = new MBTileSource();
tileSource.setFile("/sdcard/mutumapapi/maptest_30c930.mbtiles");
tileSource.open();
MapRenderer.setBackgroundColor(0xff777777);
map.layers().add(new TileGridLayer(map, Color.GRAY, 1.8f, 8));

BitmapTileLayer bitmapLayer = new BitmapTileLayer(map, tileSource);
map.layers().add(bitmapLayer);
```