Added simple main menu activity
Passing GameState to GameActivity
Updated game creation.

Now there are no dummy games. Every created game is added to the list.
Also fixed tile text sizes
Added onClickListener to menu list items
Added database helper classes
Added a content provider class
First DB test
Added some helper methods to GameState
Fixed some DB strings
Passing game state URI to GameActivity
Passing URI to GameState now works
Testing GameStateSource
Updated database schema
Implemented saving guessed words