Fix some tests in DebugMode. Shapes where cause nan, division by zeros. precison check was too high due to different order of operation on the GPU.

Import numpy gpuarray

Have "theano-cache list" include compilation times

Abstract Ops for batch normalization

(small fix) Update `theano-cache` to prevent an error message printed when `device=cuda` on Windows.

flag `device` is set to `cuda` on Windows.

Implement indexing with empty list

Implement conv2d_transpose convenience function

Add exception when epsilon is too small.

Use GraphToGPU for the new BN opt. Also remove the LocalGroupDB, as it add extra overhead and wasn't useul as there is only 1 GPU version.