Added compile time optimizations to eliminate some of the overhead associated with the search for non-zero tiles in SUMMA iterations.
The contraction functions now check for NULL task function pointers.
SUMMA iteration now uses the column iterator function to compute tile indices.
- Added a function to convert a rank-N tensor into a matrix to the ContractionEvalImpl unit test.
The arguments in the ContractionEvalImpl unit tests now use cyclic process maps.