Added the cumsum function similar to numpy's one.
Removed forgotten debug comments.
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
Declare sdot_ static.
Mark CLazyLinker_call as static.
Make the data arrays in cutils_ext static.
Enclose the op structs within an anonymous namespace to hide their symbols.
Make _executor() and _destructor() static.
Remove the sdot declaration in the test so that it may work.
Fix tests errors (float32, useless error from DebugMode(the inf is removed by an opt, faster tests)
Print more detailled warning.
Merge pull request #1705 from nouiz/fix_tests

Fix tests errors in buildbot
Better warning message.
Merge pull request #1706 from nouiz/warn_msg

Better warning message.
fix crash in the new warning message.