Updating of the Slide and ExternalResource models
Updating of the Slide and ExternalResource models

* Some name changing from resource to supplycloset.
* To better handle retrieving of actual vs. overridden attributes on Slide, the fields were renamed to FOO_ovr. __getattr__ now looks first at FOO_ovr then at content_object.FOO
* Added auto discovery of resources

callowayproject/django-resources,callowayproject/django-resources,callowayproject/django-resources