First stab at Cython extension module for Plan construction
Access thrcol through c array
Access nelems through c array
Use cstruct instead of dict
Include Plan in the op_lib_core extension module
Use directly low-level cython plan in unit tests
Fix missing declarations
Fix unit test to explicitly pass partition size
Free dynamically allocated memory
Cleanup
Add plan selection logic
Skip matrix coloring test when using legacy plan objects
Add python/c bitwise plans comparison support code
Refactor plan unit tests
The OpenMP backend requires matrix coloring
Force ncolblk to be of type numpy.int32