writter generic methods opps api
written api model, class ApiKey
refactoring api urls, use generic method via container
Written container api logic
used django-piston, removed tastypie
generated api migration
register ApiKey (class) on admin
Add opps api in INSTALLED_APPS, example project
remove articles api, used via container
Merge branch 'master' of github.com:opps/opps

* 'master' of github.com:opps/opps:
  Site set only if not set in admin form
  order_by on Site
  used self site of request
  Added multisite tags
  Add clean on test / remove repeated code on Makefile
  Added remove tmp files in make test command
  Added template fallback for multisites templates
  Fix container migration
  Added mainimage containerbox in admin
  Added main image in container box
Update Changelog to new engine piston
fix pep8
Add django-piston on dependency links