Magic Cube

Bandaged 3x3: progress with saving.

Bandaged 3x3: saving dialog.

Bandaged 3x3: implement object reset.

Cleanups.

Improve layout in the bandaged view.

Further progress with Bandaged 3x3: correct rotation of the collection of BandagedCubits.

Further progress with Bandaged 3x3.
This requires a new API in DistortedNode to change the Mesh there.

Very important bugfix in the Library: MatrixEffectQuaternion cannot share the tmp static buffers!

Progress with BandagedCreator: joining cubits together. Still at least one (probably two) bugs here remain:

1) sometimes some of the walls of the newly creaed joined cubit are incorrectly rotated
2) there is an unpleasant flash when joining

Progress with BandagedCreator: marking a cubit by touching it.