Magic Cube

Avoid the possible cutouts at the top of the screen.

Spearate the concept of number of layers of an object and its size.
In case of the Skewb family, this is no longer the same (Master Skewb has 3 layers but it's twice bigger than the 2-layered Skewb)

More debugging for the case of suspicious submits.

Improve Analytics reports

adjust requesting for review a bit more - now it will happen after a user has launched the app twice and played 7 times.

- after some time using it, request an App review
- some tweaking for the way the objects look (set internal_color to something slightly lighter than pure black, round the corners of the stickers better)
- set internal_node ratio to 1.42, this way the objects never get cut

Simplify OpenGL error dialog. Show it only once.

Simplify drawing textures.

Minor

Brighter background.