Merge pull request #43 from ecofunds/manager

Manager
models test setUp instances changes
Add Organization excel export
Add property to Organization Model

Those properties will be used by the export 
mechanism
Remove unnecessary fixture data from organization

Model test
Closes #44 - export more CSV/XLS data
Fix encadeamento de queryset.
Cosmético: return '' é o "abort" da operação.
Cria um cenário separado para testar métodos do model.
Corrige edição do nome do fixture que fazia o teste falhar.
Merge pull request #45 from ecofunds/feature/export_more_org_data

Feature/export more org data
Extract parse_centroid to ecofunds.maps.utils
Move export constants to better spot
Add lat and lng property to Project model
Use Project.{lat,lng} instead of call parse_centroid
Export Project CSV
Export Project XLS
Merge pull request #46 from ecofunds/feature/export_projects

Feature/export projects
Add logger for database queries.
Remove virtualenv-bootstrap and use plain virtualenv.