Remove tests for 1.7 and against pypy
Remove tests for 1.7 and against pypy

ekonstantinidis/django-rest-framework-docs,manosim/django-rest-framework-docs,ekonstantinidis/django-rest-framework-docs,ekonstantinidis/django-rest-framework-docs,manosim/django-rest-framework-docs,manosim/django-rest-framework-docs