added order api related files
Merge remote-tracking branch 'origin/master'
added django-countries==2.0b4 for pulling country list
added django-countries==2.0b4 for pulling country list
created migration for partners app and updated the api serializer and viewset to extend base model serializer and view set
updated core model and viewset
updated partners urls.py
correct error in partners url routing and updated partner ProgramProductViewSet name