vim: add license field to setup.py
vim: add license field to setup.py

Copying example here:

  https://github.com/pypa/sampleproject/blob/master/setup.py

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent