First pass at porting game and control system to the OUYA controller and ODK.
* Mapped D-pad to pointer controls
* Mapped left joystick to pointer control (I made it suck, though)
* Mapped right trigger and "O" button to launch bubbles
* Added "up-to-center" feature from desktop version
* Bumped to ICS (Android 4.1), per ODK guidelines
* Bumped game version to 1.8
* Modified README to reflect OUYA changes and requirements