Disable compute_test_value during Theano optimization phase. This giv…

Setting gradient for MRG_RandomStreams distribution variables to be null

Update Windows (and other generic) installation instructions

Gpu cholesky

initial commit for gradient for MRG_RandomStreams distribution variables should be null - issue #4078

and list of requirements.

Always import gpuarray.rng_mrg to have its optimizer imported.

Use Op params for GpuDnnSoftmax

move buildbot cache outside workspace

Better error message when an opt make an invalide replace.

Disable compute_test_value during Theano optimization phase. This give a better error in pymc3 issue 1939

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.