Add RecoverPassword api view.
Refactoring base views (update to new viewsets)
Minor fixes on search api viewset.
Add greenmine version router subclass.
Minor changes.
Port scrum api views to use viewsets and routers.
Minor changes on settings.
Minor changes on wiki api.
Add version to api.
Reimplement login and logout as separate viewsets.
Filter nothing if filter_fields is not defined on a view.