Remove isnan from the graph for discrete dtype.

close file with context manager

Conda fixes

GPU gemv->dot speedup for new backend

Jenkins release scripts

Fix tests when no compiler.

Since each of Anaconda/Miniconda/conda-forge change sys.version to
contain different things, and some users may install MKL outside
of conda, always try the import and then, if using conda, give some
useful information on how to install MKL (by installing `mkl-service`
not `mkl`).

Many Windows users avoid the command-line and are unfamiliar with env. vars.
They can elect to use Anaconda/Miniconda Python as their system Python and
in that case would not be able to take advantage of g++ or mkl.

This commit works around these issues by adding the appropriate values to
os.environ['PATH'] if they are not already on PATH.

 sys.prefix/DLLs for MKL DLLs

Don't allow to change gpuarray.preallocate during execution and make …

Don't allow to change gpuarray.preallocate during execution and make mandatory cxx for the new back-end.

Remove the custom version check in the __init__ of pygpu.

Moving ExtractDiag op to the new backend

fix crash in MRG_RandomStreams with the new backend

Fix reload pickle

DestroyHandler should not overwrite existing rval[app] values

[CRASH] fix crash. fix gh-5291.

This solves a problem for Ops with more than one in-place input.