Python 3.6 on Windows

[jakirkham]

This library fails to build on Windows Python 3.6.

Edit: Strangely this happens using the same VC version.

xref: pycrypto/pycrypto#216
xref: pycrypto/pycrypto#218
ref: https://ci.appveyor.com/project/conda-forge/pycrypto-feedstock/build/1.0.6

[jakirkham]

Probably this suggested change might fix it.

Edit: This doesn't really seem feasible.

[jakirkham]

Probably the best strategy would be to backport a relevant patch from pycryptodome. Though figuring out what patch would likely be a pain.

[jakirkham]

Would also note that pycrypto ships its own stdint.h for only Windows VC versions. Am guessing this is somehow clobbering the system copy. Either we need to guard against this by using it with a guard like #if defined(_MSC_VER) && _MSC_VER < 1400 or we need to add some missing pieces to it. The latter sounds volatile. IMHO we should do the former.

ref: https://msdn.microsoft.com/en-us/library/b0084kay.aspx

[jakirkham]

Fixed by PR ( #9 ).