add psycopg2 for pg support
add psycopg2 for pg support

ryankicks/collection-pipeline,twitterdev/twitter-leaderboard,twitterdev/django-signin-and-apis,ryankicks/collection-pipeline,twitterdev/django-rest-apis,ryankicks/collection-pipes,twitterdev/django-rest-apis,twitterdev/django-rest-apis,ryankicks/collection-pipes,twitterdev/django-rest-apis,ryankicks/collection-pipeline,twitterdev/django-signin-and-apis,twitterdev/django-signin-and-apis,ryankicks/collection-pipes,twitterdev/django-signin-and-apis,ryankicks/collection-pipeline,twitterdev/twitter-leaderboard,twitterdev/twitter-leaderboard,ryankicks/collection-pipes