A first implementation of a potential cross-platform MBTiles solution.
First working and tested version of an MBTiles layer on Android.
Fixed memory leak issues. Updated MBTiles rendering.
Merge branch 'master' into sqlite
Merge pull request #107 from flowpilots/master

Made methods in Layer protected internal.
Minor changes to image handling.
Modified renderer and target wrapper.
Merge branch 'master' into sqlite
Fixed MBTile layer with nex access modifier.
Fixed memory leak issues by adding image cache. Improved performance by removing explicit call to GC.
Added winforms native images.
Added iOS native image.
Added iOS SQLiteConnection implementation.
Created a platform-specific initialization to make things easier.
Added a platform-specific initialization for Android.
Updated submodule.
Updated sample with mbtiles.
Merge pull request #111 from OsmSharp/sqlite

SQLite implementations and memory issue fixes
Updated OsmSharp.Data.SQLite packages.
Improved preprocessing step, working towards #89.