Magic Cube

add two missing files

Remove all files that have been separated into a new library 'objectlib'

Prepare the 'objectlib' package to be separated into a library module

Rename some assets for consistency

Refactoring: split the 'objects' package into two, 'objects' and 'objectlib'.
The point: we're going to need to move the 'objectlib' stuff into its own library module, and that's because we're going to create a new app module which needs access to it.

Important bugfix.

Remove redundant variable.

Do away with the last method in the object Movement classes. Remove the object Movement classes altogether.
From now on the implementation of a TwistyPuzzle is 100% data, no code at all.
Next step: make the implementation a (generated?) (XML?) file.

Next step on the way to completely do away with object Movement classes.

Correct the cuts of Mega/Kilominx.