Add clients app

Clients app stores all information regarding client enterprises, the
products they advertise and the locations where the campaings are held.
Add category model

Store the categories or product lines.
Add brand model

Store the product brands.
Add product model

A product has category, brand and belongs to an enterprise.
Add location model

Locations are the places where the campaings are deployed.
Add client models on admin pages
Add clients to installed apps
Add adm_divs app

adm_divs manages administrative and political division for location
purposes.
Add adm_divs models

Models for adm_divs application. Division is the main model which hold
the division description and relations. Country inherits from Division
adding division's definitions info.
Add Chile administrative divisions as initial data

Fixtures on initial_data.json contains the Chilean administrative
divisions's data. Chile has a division's depth of three and the
division's definition are "Regiones","Provincias" and "Comunas".