enable local apps and middleware
Merge remote-tracking branch 'github/master'
Avoid to fetch data again by using a flag in the fetched data.
remove mapnik2 import outside from try statement
common messages template
user provider class and loader
Iterator and user property accessor regardless of the user model used
Django User model by default. It is needed for some apps developped by
french team.
adding invitation app (sw_invitation)
return key on creation
app activation
Merge remote-tracking branch 'isi/feature-invitation'

Conflicts:
	apps/sw_invitation/README.md
	apps/sw_invitation/models.py
	settings.py
	urls.py
activate debug for survey in test
update translations