Add a class with media needed to display translation fields in plain admin predefined.
Merge branch 'feature/tabbed-fields-convenience' into develop
Let options.fields be a set.
Return empty TranslationOptions object instead of raising a NotRegistered exception when asked for options of a model not registered with the translator.
Update "sync_translated_fields" not to test for the no-longer raised exception.
Merge branch 'feature/concrete-supermodels' into develop
Merge branch 'feature/loose-registration' into develop
Add a setting letting South ignore all translation fields, to support weak integration with third-party apps distributing their own (potentially conflicting) migrations.
Merge branch 'feature/hide-from-south-option' into develop

Conflicts:
	modeltranslation/settings.py