windows support

[davidtjones]

This wasn't a terrible amount of work. Setting up python for development on windows is more difficult than anything in this branch. See #2.

Possible pain points:

• libmelee doesn't use any kind of solid path scheme (pathlib, os.path.join, etc), so there are some perilous locations where a "/" is added to satisfy libmelee
• this is my first shot at cross platform support. Nothing in the install is super complicated but I'm not sure what can wrong between different operating systems.
• Additionally, is AppData/Roaming actually a good place? I'm not well versed in Windows paradigms.

[cnkeats]

Looks good to me!