Enable build for Python 3.3, 3.4 / Windows

[skvark]

The build time is fast enough on Appveyor so support for py33 and py34 can be added. Also the Appveyor build scripts could be refactored.

[glitchassassin]

Forking this to try to implement. Looks like numpy doesn't want to play nicely with pip in Python33 or Python34. Luckily it sounds like AppVeyor can include numpy through conda instead.

I'll try refactoring the build script and see what I can come up with.

[skvark]

Thanks. It seems that numpy has wheels for 3.4 but not for 3.3 (https://pypi.python.org/pypi/numpy/1.11.1).

[glitchassassin]

Added pull request, #19.