- Clickable buttons representing the cells/pieces on the board (the
button listener needs more work, it's very basic at the moment)

- The new CellButton class extends the ImageButton class to give us a
reference to the correct Cell object in the model layer 

- Changed the images to work in the CellButton (the old images didn't
have a border on them, now all images have a border)
 
- Running the app will present the user with the board directly (check
the manifest, I commented out the GameActivity)

- Added all the pieces to the ArdRiBoard

- Applied a theme to give the app a white background