Merge remote-tracking branch 'backend/feature/fields_refactor' into
feature/fields_refactor.

At the time of this merge I saw GLBackend's unittest failing with:
FAILED (errors=12, successes=266)
Meanwhile GlobaLeaks has:
FAILED (errors=10, successes=84) with setup.py test. (thiz iz wrong)
FAILED (errors=12, successes=266) with trial.

Conflicts:
	backend/globaleaks/__init__.py
	backend/globaleaks/handlers/admin.py
	backend/globaleaks/models.py
	backend/globaleaks/settings.py
	backend/globaleaks/tests/handlers/test_admin.py
	backend/globaleaks/tests/test_rosetta.py
	globaleaks/handlers/admin.py
	globaleaks/handlers/admin/__init__.py
	globaleaks/models.py
	globaleaks/models/__init__.py
	globaleaks/tests/handlers/admin/test_admin.py
	globaleaks/tests/handlers/test_admin.py
	setup.py