GEMM/SYRK codemap refer to inputs, not args
test for previous commit
syrk.codemap calls args again

necessary for transpose detection
GEMM uses inputs for C
don't sympify inputs
fix tests associated with no longer sympifying
constant_arg doesn't depend on str for MPI_ testing
Merge branch 'master' of github.com:mrocklin/computations
make fortran code test case insensitive