Fix guard macro name
Simplify TextLabel class

Delete renderText() private method, move logic to render()
Refactor Cube class

Make cubeParts 3d array, improve code readability
Refactor Cube class

A couple of veriable renamings
Refactor CubePart and TextLabel classes

Make them Mesh subclasses, rather than aggregate Mesh instance
Remove empty line that irritates me
Merge branch 'master' of github.com:santa01/rubik