Merge: Rubix cube

Merge: Rubix cube

A simple Rubix Cube library, don't mind the diff, a huge part is just test reuslts :)

It should support all the commands from the Singmaster notation (see [here](http://ruwix.com/the-rubiks-cube/notation/) for more details on the notation)

Note that the big number of specialized top-level functions with ints show in this case how useful a proper Enum system would be :)

Pull-Request: #2032
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexandre Terrasa <alexandre@moz-code.org>