added CHANGELOG
added CHANGELOG

jkal/django-notification,dhan88/django-notification,lehins/lehins-notification,brosner/django-notification,lehins/lehins-notification,festicket/django-notification,arctelix/django-notification-automated,aptivate/django-notification,theatlantic/django-notification,theatlantic/django-notification,ntucker/django-notification,pragmaticbadger/django-notification,daniell/django-notification,JordanReiter/django-notification,daniell/django-notification,ntucker/django-notification