Believe it or not, "create_type" has never, ever checked to see if the given supertype is a valid type. The code now verifies that the given supertype is a child of "acs_object", except when supertype is passed in as NULL or '' (in which case it's set to acs_object). Only did it for PostgreSQL since it's been around forever and whatever Oracle users don't know, won't hurt them.
Moved table building and column adding code from content repository to kernel, so all objects can benefit. Part of the acs object management package work.