rm: python2.7 support

<Batman>
Because its the hero Deuce deserves, but not the one it needs right now.
you either die a hero, or live long enough to see yourself become the
villain.
</Batman>
namespace : remove explicit py3 reference
fix: tox py34 now takes in pip-requires
fix: missed py3 change in config.py
Merge pull request #113 from TheSriram/rm_py2

rm: python2.7 support