24.Commit:	msk_v01 impl with z-order
mskoenz

DONE:
- impemented z order (not much speedup for L = 128)
- added int_accum since double accum used up 50% of the performance (400->200 cycles per step)
- changed from arrays to vectors since arrays have trouble getting the memory for large sizes (2h bug... ugly)
TODO:
- fix array alloc problem
- grid interface
- check physics