To use:

1. Create a virtual environment, activate it and install pip
virtualenv agromapas
source bin/activate
easy_install pip

2. Create an src dir and checkout the code
mkdir src; cd src
git clone git://github.com/ingenieroariel/agromapas.git
cd agromapas
pip install -r requirements/external.txt

That would install django, and all the other dependencies inside your virtualenv

3. Create a local_settings.py file with your database name, user and password