Added `PROJECTS_PROJECT_MODEL` to base settings.
Fixed `save` method in `BaseProject` model (`super` called wrong model).
Merge pull request #119 from jose-lpa/integration

Quick fixes for latest `projects` app changes.
Merge pull request #120 from gannetson/integration

Integration
`projects` factory models fixed.
Fixed `ManageProjectSerializer`.
Fixed `homepage` app to work with the new `projects` generic approach.
`projects` views fixed to use the settings-defined model
`projects` permissions fixed to use the new generic model.
`projects` models reviewed.
Merge pull request #121 from jose-lpa/integration

Several fixes to make use of the new generic `Project` model all around.
Add gmap for projects - wip