[Wien] Determine primitive cell and positions, CXZ LATTICE 15_B2/b

[David Olmsted]

Peter,
  Thank you very much for the help.  My job has only just made its way
through the queue, but I can see just from the memory usage that you are
right and this is going to be much quicker.  RMT is now 0.63 for H instead
of 0.47, etc.

Best regards,
  David