Relax GpuArrayType.filter() when applied to python floats so that it mimics the Tensor behavior a bit more.

WIP: Custom pickler for shared variables

[BUG, TEST] Fix bug in numpy 1.9 and test in DebugMode

Binary mode for test files

Added import

Reading in binary mode

Used BytesIO

Binary mode for zip

Binary mode in tests

FLAKE8

Added test pkl_utils into flake8 whitelist

Refactored pkl tools and tests

Removed test_pkl_utils from flake whitelist

Use doctest to update pydotprint plots and debugprint output

Average pool CPU with python code

[CRASH] Make MaxAndArgmax support NoneConst as axis.

[TESTS] Fix crash in tests in debugmode and small optimizations.

Merge conv2

Added doc for strict flag.

Small doc fix gh-2793

Change cache refresh patter for speed up

Better error message when missing dimension in initial value in Scan