* enablenpc / disablenpc / hideoffnpc / hideonnpc now display the npc source when the npc named doesn't exist
* Added the NPC source to status_set_viewdata when no view data has been found
* Added export_deprecated_constant3 to display the constant name replacing the deprecated
* Removed the debug message from `@ warp` when the map name is wrong
* Added clif_name_area to UMOB_LEVEL on setunitdata and a capvalue to UPET_HUNGER
* areamonster now checks if the monster ID exists
Thanks to @Normynator and @aleos89 for the review!
* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.