Added South and app rost

The app rost implements two models Route and Stage
Each route has multiple stages(stops) for ex: Route
182A has stages Begumpur,Sukhbir Nagar, Kashmere Gate
etc.
Further each Stage keeps a list of Routes through that
Stage and each Route keeps a list of Stages it has.
A sample dump of DB

This will be used to create a fixture for the database.