Update CONTRIBUTING to reference the new 0.3 release branch
Update CONTRIBUTING to reference the new 0.3 release branch

django-helpdesk/django-helpdesk,gwasser/django-helpdesk,gwasser/django-helpdesk,gwasser/django-helpdesk,rossp/django-helpdesk,rossp/django-helpdesk,rossp/django-helpdesk,rossp/django-helpdesk,django-helpdesk/django-helpdesk,django-helpdesk/django-helpdesk,django-helpdesk/django-helpdesk,gwasser/django-helpdesk