Magic Cube

Support TYPE_SPLIT_CORNER in case of DODECAHEDRONS and up the version of the object interpreter to 20.

Still small correction

actually use the three save modes

Make it possible to control when to save solves:

- always
- never
- aks each time

Add version to the solves JSON and make sure that if the files is somehow corrupt, it simply gets deleted.

Move all move-related stuff to its own package

fix for YouTube tightening its policy

Progress remembering solves.

minor

progress with remembering solves: properly abstract out saving/restoring the Object State to/from JSON to the objlib.