Added Procfile heroku

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>
dj_database_url and psycopg to requirements.txt

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>
Fix procfile for heroku

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>
Serve static files through django in heroku.

Signed-off-by: Fernando Rocha <fernandogrd@gmail.com>