Add CONTRIBUTING file for github
Add CONTRIBUTING file for github

Zopieux/django-blog-zinnia,ghachey/django-blog-zinnia,Zopieux/django-blog-zinnia,Fantomas42/django-blog-zinnia,ghachey/django-blog-zinnia,Fantomas42/django-blog-zinnia,Fantomas42/django-blog-zinnia,ghachey/django-blog-zinnia,Zopieux/django-blog-zinnia