Merge pull request udacity#52 from SteveWooding/patch-1

Install latest version of Pip, instead of distribution version

Author: karlud

vagrant/pg_config.sh

@@ -2,6 +2,9 @@ apt-get -qqy update
 apt-get -qqy install postgresql python-psycopg2
 apt-get -qqy install python-flask python-sqlalchemy
 apt-get -qqy install python-pip
+pip install packaging
+pip install appdirs
+pip install -U six
 pip install bleach
 pip install oauth2client
 pip install requests