Howto install Odoo on Debian 7 64bit

This is an attempt at shortening the installation time of Odoo (OpenERP 7) on a pristine Linux Debian system. In particular, we'll execute this procedure on a 2GB RAM VM from Digital Ocean, a recent, cheap and efficiente hosting provider. First off, you'll need to install PostgreSQL. This is important, as the Debian package for Odoo does not install nor configure postgresql at all.