Fixes #176.  Exception was being thrown in return HttpResponseRedirect failing to parse primary key as integer into URL.  Also needed to prevent MethodFamily from being deleted if it was pre-existing.
Fixes #176.  Exception was being thrown in return HttpResponseRedirect
failing to parse primary key as integer into URL.  Also needed to
prevent MethodFamily from being deleted if it was pre-existing.

cfe-lab/Kive,cfe-lab/Kive,cfe-lab/Kive,cfe-lab/Kive,cfe-lab/Kive