http://stackoverflow.com/questions/2720014/upgrading-all-packages-with-pip
sudo pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs sudo pip install -U
http://stackoverflow.com/questions/2720014/upgrading-all-packages-with-pip
sudo pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs sudo pip install -U