Fix sponsor key field extraction When extracting key field there is no sponsor or user object, instead only their link names are known.

Implements base.Logic functions in home_settings, site_settings and work This patch implements the base.Logic funtions needed for making logic/key_name.py obsolete. This patch defines the needed functions in home_settings, site_settings and work. All modules in logic/models now have these functions defined. logic/models/site_settings.py now inherits from logic/models/home_settings.py because of their similar connection in the corresponding models. Please note that the self._keyName for these two modules still points to logic/key_name.py since entity_type is still used in views/home.py. A partial_path and link_name were added to HomeSettings as requested by SRabbelier.

Fix wrong redirect when changing partial path or link name. Remove an unnecessary assignment in logic/models/base.py that would generate an error when an entity did not exist. Patch by: Lennard de Rijk Review by: Pawel Solyga

Fix not working former ids feature of User Profile Developer Edit view. Add missing Error exception class to soc.logic.models.base module. Patch by: Pawel Solyga

Third-party Javascript that should have been part of r891. Same license as JQuery. Patch by: Todd Larsen

Minor fixes needed for generic key name We no longer try to retreive an entity when there are unset fields. This sort of makes 'getIfFields' obsolete, since we check if fields now anyway. This is needed because getKeyFieldsFromDict expects the fields to be set. Also a minor fix in a Django template so that the generic 'edit' page has a working delete button again.