text: Title: ENH: Switch from disutils to setuptools
  Body: We planned on switching from disutils to setuptools for some time, but this is just to keep track and reiterate some of the possible benefits:
  
  Can have it compile c and not have to include pyx files as mentioned in #759
  Can have install_requires set, which will probably fix the current issue with appveyor.
  From what I'm seeing, we can remove the setup.py files in the sub directories. 