Add LocalSequenceDB and LocalSeqOptimizer
Make fft convolution tags have higher prio then the default gpu conv opt.
fix test in FAST_COMPILE
Small fix to pydotprint_variables
Revert variable name change as this break user interface and numpy compatibility
[BUG] Fix bug introduced by gh-2195 merged yesterday.

This relax a condition in DimShuffle to help reuse it.

We where removing the DimShuffle, it was working when it was only
adding outer dimensions, as the Elemwise would readd it. But if it did
other stuff, we where loosing what it did.
Remove an assert and implement that case.
Merge pull request #2212 from nouiz/fft_conv

[BUG] Fix bug introduced yesterday, fix FFT conv optimization and small pydotprint fix.