Fix tests error in DebugMode. Make DebugMode more pickable

Add the setup to build conda packages

buildbot mac no GPU

Fix a test in DebugMode by makeing _Maker reuse its parent class create method. The sub-version don't seem to add anything useful.

Fix pickling of DebugMode by using the string of reasons. Theano local optimizer aren't picklable most of the time.

R_op for ZeroGrad + tests

Add unravel_index and ravel_multi_index

Dilated causal convolution

add decsription for rnnblock

Fix a memory leak in theano

Use E_PADSHAPE flag in GPU Incsubtensor

ExtractDiag cleanup #5633

Make it more clear error when not enough GPU memory. fix gh-6397

test MRG random stream with device=cuda and target=cpu

Fix unit tests for CEnumType.

Gpu stack follow up