Magic Cube

Simplify objectlib's API.
Correct a recently introduced bug with resetting texture maps.

Move QuatHelpeer to distorted-library

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

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

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.

Major abstraction - automatically compute the 'computeRowFromOffset()' function from CUTS.
Still one thing left: it appears like the CUTS of Mega/Kilominxes are not correct.

Move the Movement class from ObjectList to individual object classes.

Move actual solving the object to PreRender.

(before we had a 'solveObejct()' in preRender already, but that one just starts the Solve Effect!)

1) add missing call to BlockController.onPause() / onResume() to the Tutorial activity
2) rearrange BlockController's error reporting to make the case where the MessageSender thread has died separate
3) in such case, resurrect the thread
4) simplify and harden the EffectMessageSender

Add Mirror 2x2 tutorials.