Add an Android CursorLoader and CursorAdapter implementation

Using OrmLite on Android requires more code than it seems like it should.  This pull request implements a fairly standard Loader and Adapter to make ormlite easy to use with contemporary Android paradigms like Fragments.

It relies on PR https://github.com/j256/ormlite-core/pull/17 in ormlite-core to facilitate the notification aspect of Android Loaders and Adapters.