Update message to mention the need to clear the cache
Fix bug in scan merge optimization reported by Yao Li.
Fixed bug in tutorial -> Derivatives in Theano -> Jacobian times a Vector -> L-operator.
Correctly treat remaining factors in optimization

instead of asserting they did not exist.
Generalize optimization to more inputs in mul
Merge pull request #1508 from flashus/master

BUGFIX: tutorial -> Derivatives in Theano -> Jacobian times a Vector -> L-operator.
Merge pull request #1504 from lamblin/update_advidx_msg

Update message to mention the need to clear the cache
Fix compilation crash reported in gh-1518 for gpujoin.
Merge pull request #1520 from nouiz/gpujoin

Fix compilation crash reported in gh-1518 for gpujoin.
Fix the tutorial to make it work with python 32 and 64 bit.
Remove ordereddict warning from tutorial
Fix the detection of cpu vs gpu in the tutorial.

new op wasn't added there.
make sure the directory exist.
Provide a better error message for pydot bug.
Add test for the opt local_dot22_to_dot22scalar
Make local_dot22_to_dot22scalar opt work in one more case.
code cleanup.
Merge pull request #3 from nouiz/lamblin-fix_1507

Add tests and opt one more case.
Make the test code as the tutorial code.
Merge pull request #1521 from nouiz/fix_tutorial_int32

Fix the tutorial to make it work with python 32 and 64 bit.