working game logic added in cube

create a cube object and add cards to it then test for match
Merge branch 'master' of https://github.com/phoenixperry/crystallography

Conflicts:
	Crystallography/Crystallography/TitleScene.cs
fix
Merge branch 'master' of https://github.com/phoenixperry/crystallography

Conflicts:
	Crystallography/Crystallography/TitleScene.cs
added in functionality for sprites + working on singleton
sprite sheet singleton pattern added
grr