Testing fullscreen API

Fullscreen API
Second try.

Let's see what parentIsWindow does.
Fullscreen API integration

Rewrote input handling and integrated Fullscreen API.
Removed pIW
Removed a pointless event handler

GameOver.Game.button
Last attempt for tonight

After this I'm out of ideas
Merge pull request #1 from anttioja/mobile-testing

Mobile testing branch merge.