Sudoku 10,000 Trial

- Reformatted the layout. The Pencil Note keyboard and the Values keyboard are both displayed at all times. No more toggling a radio button to choose which to use.
- Landscape layout places the keyboards on either side to make it easier to reach each with both hands.
- Upon completing a puzzle, the action bar will display a button to allow you to select the next one at the same level.
- Implemented an Action Bar. Easier access to the menu.
- Internal changes - quite extensive, actually.