remove whitespaces from line 6531

Fixed issues 6226, 6227, 6228, 6229, 6231, 6232, 6233, 6234, 6235, 6236, 6238, 6239. Changed the documentation, fixed some spelling and (rarely) changed formatting.

Support NumPy 1.13

Restrict cuDNN reduction to contiguous inputs

Try to fix segmentation fault related to last updates in cuDNN conv codes.

test optimization in grouped convolution

Flag to disable pickling test values

Tensor op, cache

3D separable convolutions

Fix test in the daily buildbot and make sure to don't loose the current linker.

Attempt to lock PR tests to the specific version of libgpuarray that they require.

Add covariance matrix function theano.tensor.cov