Django 1.2 tweaks, bugfixes
Django 1.2 tweaks, bugfixes

* Try to better support Django 1.2, and missing user_logged_in signal
* Look for PngImagePlugin outside of PIL
* Silently fail if deferred_award email templates missing

Nuevosmedios/django-badger,abztrakt/django-badger,mozilla/django-badger,Nuevosmedios/django-badger,lmorchard/django-badger,donberna/django-badger,abztrakt/django-badger,hackultura/django-badger,mozilla/django-badgekit,hackultura/django-badger,donberna/django-badger,mozilla/django-badger,abztrakt/django-badger