Change key_name module usage to path_linkname module (fix to previous commit). Add comments about urls. Add Sponsor views urls for upcoming Sponsor views modules. Patch by: Pawel Solyga Review by: to-be-reviewed

class_prepared = object()

pre_init= object()
post_init = object()

pre_save = object()
post_save = object()

pre_delete = object()
post_delete = object()

post_syncdb = object()