Attempt at adding SYRK.  Not working, pushing to mrocklin can see.
Added SYRK to BLAS calls.  Still need to test out the backend.

There is some question as to how to deal with transposes,
especially when arguments are re-used or transposes are
passed into operations without transpose support (e.g. C
in GEMM).  More on this soon.
Merge branch 'compblas' of github.com:maxhutch/sympy into compblas
move theano linear regression test to printing