Patron Stat Cat Enhancements: Add Publisher actor methods for stat_cat_entry_default...

Patron Stat Cat Enhancements: Add Publisher actor methods for stat_cat_entry_default objects.

Add methods actor_stat_cat_entry_default and actor_stat_cat_entry_default_ancestor
to retrieve and populate stat_cat_entry_default objects.  Modify ranged_actor_stat_cat_entry
and fleshed_actor_stat_cat to also include default entry objects, if present.

Signed-off-by: Scott Prater <sprater@gmail.com>
Signed-off-by: Ben Shum <bshum@biblio.org>
Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>