Use Vagrant to setup Longturn django development server

[ghost]

Hi! To make it easy for other developers to setup a Longturn development environment,
I suggest you implement support for using Vagrant to setup a local server.

The Vagrant setup could create the database, setup and install all dependencies, build and run the www django project, build the longturn Freeciv server.

For example, here's how Freeciv-web handles Vagrant:
https://github.com/freeciv/freeciv-web/blob/master/Vagrantfile

See more information here: http://www.vagrantup.com/