Also use the other arg of sub as output.
Don't discard the previous input to OuterSS().
Fix bug.
Add a mode to docgen to run the code samples in the documentation.

This alleviates copying them elsewhere to ensure they are not broken.
Add 3d correlation based on matrix multiplication
Fix errors in the gradient definition
First version of the C op tutorial.
Added C op tutorial to tutorial index.
Small fixes
Add PyDecref(cols) when an error occurs
Rename conv_gemm to corr_gemm
Update flops method
Fix typos
Implemented cuDNN softmax but it is not currently passing tests.
Changed documentation comment.
Fixed eq and hash functions.
Fixed problem with cudnn softmax tests. This fix should be generalized for use of the class. Also there are two cases it cannot handle.
Incorporated reviewer comments.
Fixed typo.
Added clarification comment.
Specified types of theano variables.