(a.out, no work on cpushare integration here)
- introduce rubikutils, basicaly MR's structures and cube functions, but
      adding cube orientation to the cube structure
- rubikutils' main() inputs and validate a cube with center faces. 
- input order is:
F R U B L D UF UR UB UL DF DR DB DL FR FL BR BL UFR URB UBL ULF DRF DFL DLB DBR




git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/research@2739 92316355-f0b4-4df1-b90c-862c8a59935f

* Add a grayscale plane to illustrate non-orthogonality.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/research@2723 92316355-f0b4-4df1-b90c-862c8a59935f

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/research@2677 92316355-f0b4-4df1-b90c-862c8a59935f