Add members relation to project
Add filtering of permitted objects to managers

Makes it possible to call Model.objects.permitted(user) on Project,
Build and BuildResult
Add permitted objects filtering in views
Fix pep8
Merge branch 'master' of github.com:frigg/frigg into permissions

Conflicts:
	frigg/builds/fixtures/test_views.yaml
	frigg/builds/models.py
Merge pull request #67 from frigg/permissions

Add filtering of repos based on membership (Depends on #64)