* Implement batched matrix ops, including transform, determinant, transpose, and construction and getmatrix with spaces, multiplication, division, negation.
Moved helpers det2x2, det3x3, and det4x4 from opmatrix.cpp to Imathx.h so they could be shared with the wide_opmatrix.cpp.
Enabled BATCHED testing for matrix and transform testsuites
Added new BATCHED_REGRESSION testsuites array-reg, matrix-arithmetic-reg, matrix-compref-reg, matrix-reg, transform-reg to more fully exercise combinations of uniform and varying data types and indexing variables.
* Removed #if 0 code block of determinant match that was moved to Imathx.h
Signed-off-by: Alex M. Wells <alex.m.wells@intel.com>