need to patch setup.py

[asmodehn]

We need to patch setup.py to use setuptools instead of distutils.core...

-> better to use pure catkin to not depend on catkin_pip ?
-> make catkin_pip handle this case ?
-> should a python package use distutils.core directly ?

This is similar issue to pyros-dev/backports.ssl_match_hostname-rosrelease#1

[asmodehn]

Given that setuptools is the "official pypa way" I think upstream should be patched...