Added CONTRIBUTING documentation to repository
Added CONTRIBUTING documentation to repository

pinax/django-mailer,temnoregg/django-mailer,joebos/django-mailer,ilvar/django-mailer,zamazaljiri/django-mailer,WebsandHQ/django-mailer,CompileInc/django-mailer,Ubiwhere/django-mailer,chriscauley/django-mailer,jesseh/django-mailer,duh386/django-mailer,ryanshawty/django-mailer,jawed123/django-mailer,felixxm/django-mailer,alepane21/django-mailer,guoqiao/django-mailer,asgeirrr/django-mailer,pinax/django-mailer,jacinda/django-mailer,matllubos/django-mailer,JordanReiter/django-mailer,spookylukey/django-mailer,jshalvi/django-mailer