setup.py: use setuptools instead of distutils.core

[jtriley]

adds ability to use "python setup.py develop"

[kevinw]

since setuptools isn't in stdlib, do you think it's worth asking people to get it elsewhere? my goal with the released zipfile is for it to just work(tm)...I'm not that versed in Python's (current) packaging landscape. any thoughts?

[jtriley]

I think it makes sense to support both distutils and setuptools via a try/catch block and this seems to be what most big projects do (look at IPython for example). I can update my pull request with this, however, it seems that this change has already been incorporated in pull request 18:

https://github.com/kevinw/pyflakes/pull/18/files#diff-3

If you're planning on merging 18 then I'm more than happy to close this. Otherwise, I'll update this pull request with a try/catch block.

~Justin

[npinto]

Got something working here:
https://github.com/npinto/pyflakes

Still needs some clean up but it works. I'm really thinking about forking this and supporting it myself, what do you think @jtriley ?