Add ModelAdapter

An ArrayAdapter wich plays nicely with the new AsyncTaskLoader.
Change Initialization point of mAuthority
Merge pull request #39 from xArthasx/master

Content provider NullPointerException
Merge pull request #36 from vonloxley/ModelAdapter

Add ModelAdapter
Format police. getItemId() fails silently. setData conforms to Android standard.
Merge remote branch 'upstream/master'
Add convenience methode all() to fetch all entities of a table.