Make ScipyGer opt faster by not creating new object each time.
Fix ScipyGer compute_map unhandled error.
Make test error more informative.
Add gpu blas timming.
Test NumPy blas flag before reusing them. Sometimes the dev package
isn't installed, so we can't reuse them.
Merge pull request #1704 from nouiz/scipy_ger

Fix ScipyGer crash