Some code cleanup
Some code cleanup

Moved monster/item spawns out of place_objects and into separate spawn_monster and place_item functions
--Makes code nicer to read, also allows spawning of items/monsters at specified locations outside the remit of creating a new room
--Next update, thanks to this: summoner monsters!  Bifurcating slimes and orc necromancers!
Orc Archers can now drop Orc Shortbows (10% chance)
Fixed bug in monster_mutator that was leading to doubled-up mutations (I think??)
thorsilver/Deadly-Depths