still working on undo rot arm

still working on undo rot arm
undo armature rotations working

when the armature is rotated, the final puzzle must appear straight,
with correct face rotations.
its working.
now to coloring
rotating armature on z by keyboard

changed the z axis offset of center to 'o' and 'p'
Merge branch 'master' of https://github.com/nelsonbss/rubiks into gui
master merge