No need for root_argument out of MPI anymore.
Changes sgemm to the original BLAS interface.

Now has the same interface for blas_sgemm that appears here, for
example:
http://docs.oracle.com/cd/E19422-01/819-3691/sgemm.html
Merge branch 'blasify-transpose' into blasify
Fixes unmatching brace from automerge.