Update rosdep/python.yaml

make python-qt4-gl support for debian.
Update rosdep/python.yaml

Support python-qt4-gl 
Update rosdep/python.yaml

make python-pydot for debian
Merge branch 'master' of git://github.com/ros/rosdistro

Conflicts:
	rosdep/python.yaml
Merge pull request #370 from reyoung/master

Make several package in python support for Debian