Visual proof of concept

- add grid for the playing field and a score header
- better project structure
- remove generated code
Initial game logic classes
Add first test (indeed fixing one error right away - awesome!)
Add tests for Grid class
Add suite for calling more than one single test
Improved tests for Cell and Grid
Add MCP.addStartfields and corresponding test
Implement basic movement of one tile to right including test
Add tests for moving a single piece to the very right from different starting positions
Add tests for double movement (2 fields) with and w/o resulting merge
Enable customization of gridSize during instance creation
Add tests for multiple scenarios including a full, immovable row
Add missing comment
Add grid rotation and mirror-methods with tests
Pimp tests with better output on fail
Upgrade gradle to 1.11 and android-gradle to 0.9.1
Add temporary catch for every other direction than right
Add Crashalytics SDK
Set 0.x as debug version and a version name suffix for debug builds
Fix typo in constant