add npc-related builtins
Created by: Helianthella
for use with https://www.themanaworld.org/index.php/User:Meko/Tiled/NPC_Proposal
closes #38 (closed)
Created by: Helianthella
for use with https://www.themanaworld.org/index.php/User:Meko/Tiled/NPC_Proposal
closes #38 (closed)