Initial implementation of GameOfLifeScene.
Merge pull request #10 from vijoc/game-of-life

Initial implementation of GameOfLifeScene.
Implement basic SceneManager and changing scenes with number keys.
Merge pull request #11 from vijoc/scenemanager

Implement basic SceneManager and changing scenes with number keys.
Fix issues with GameOfLife.
Merge pull request #12 from vijoc/game-of-life

Fix issues with GameOfLife.