Moves product stat view logic to serializer

- Split frontend into multiple files
- Bump frontend deps
- Remove unused stuff

requirements.txt

@@ -6,4 +6,5 @@ django-widget-tweaks==1.3
 facebook-sdk==0.4.0
 gunicorn==19.3.0
 mysqlclient==1.3.6
+djangorestframework==3.3.1
 Pillow==3.0.0