Add setuptools to setup.py
Add setuptools to setup.py

Suggest using setuptools, rather than raw distutils in the setup.py.

setuptools is pretty much ubiquitous these days, so it's not likely to be a problem. And pip requires setuptools, so anyone doing ``pip install`` is guaranteed to have it.

But it's a better option, particularly on Windows, where recent setuptools can properly find the "MS VS compiler for python2.7", whereas distutils cannot.
ocefpaf/pyproj,pyproj4/pyproj,ocefpaf/pyproj,pyproj4/pyproj