Add support for qcdlib domain-wall fermion format about quda HOT 1 CLOSED

I have done and it's pushed into master. I have added a new enum type call QUDA_QOP_DOMAIN_WALL_FIELD_ORDER which corresponds to an array of pointers to 4-dimensional fields. There is an new ColorSpinorOrder child class which takes care of all of the ordering. All cpuColorSpinorField accessors, use these abstract order classes, so all functionality should just work (copy, compare, etc.). Given that pack_spinor.h should also be updated to use these accessors, which is beyond the scope of this work, when a copy to a CUDA field is requested, a temporary QUDA_SPACE_SPIN_COLOR_FIELD_ORDER field will be created and used as a proxy. Not ideal, but this will allow in principle for qcdlib to interface immediately to the domain wall solver.

from quda.