Modifications in order to pass the tests in pylearn2/cross_validation/tests/test_cross_validation.py

Stop adding -L/usr/local/cuda/lib{,64} as argument to nvcc.

Switch to cublas v2

This was never needed and also causes the errors with fatbinwrap_65.

Opt that remove useless tile

Speed up Debugmode

Also, make less call to may_share_memory.

GetItemList

Move sum to the GPU more frequently, and fix crashes

Don't get in the try except above, by checking for the attribute manually and doing the right thing.