Fix deprecated import
Version 1.0.0
Don't go to version 1.0 too fast
Use django-browserid instead of social-auth

The django-browserid package is much more secure, and managed by the
Mozilla folks.
Strip tags when added

Fixes: #56
Clear the add tag form when the request is done

Fixes: #57
Allow adding multiple tags at once

Tags must be separated by commas or semicolons. The suggestion mechanism
does not take that into account for now.
The comments number is the thread emails count minus one

Fixes: #64
Merge branch 'release-1.0'
AUTH_PROFILE_MODULE is deprecated since Django 1.5
Reorganize tests
Merge branch 'release-1.0'
Fix usage of assets
Make attachment form inputs unique