Better error message when an opt make an invalide replace.

Unsigned char:  fix: theano/scalar/basic.py

change default dnn path on windows

Do the review, add support to recreate the error with just an error message as some error handling code append to existing error message.

Changes to GpuEye to enable `k` offset parameter.

Remove call to GpuKernel_init with binary

As it is trying over and over to compile it as source.
Also, start removing generation of binaries from Theano.

Disk cache option for gpuarray

Implement new op param type `EnumType`

preallocate with a direct call.

Updated numpy as np #4218

Fix memory leak

Remove the old backend and all of its tentacles