Updated README.
Updated README.

ui/django-post_office,yprez/django-post_office,JostCrow/django-post_office,fapelhanz/django-post_office,ui/django-post_office,jrief/django-post_office,RafRaf/django-post_office,CasherWest/django-post_office,ekohl/django-post_office,LeGast00n/django-post_office,CasherWest/django-post_office,carrerasrodrigo/django-post_office