Being vs BeingGroup ids and level generators

[yaflhdztioxo]

Beings can, like most objects, be referred to by their numeric ID or their textual ID, with preference given VERY strongly to the textual ID. being_groups however has no textual ID. A direct consequence of this is you cannot specify a LIST of being groups when calling level:flood_monsters. For completeness' sake it would be nice to have text IDs and to integrate them into the level gen functions where appropriate.