sfall 4.3.6

Changelog:

• Minor code fixes and improvements to sfall and engine functions
• Fixed UseWalkDistance having no effect when trying to use a ladder
• Fixed float_msg script function not setting the purple or black text color correctly
• Changed mode 1 of NPC combat control mod to require sfall debugging mode to control all critters in combat
• Added a fix for NPC stuck in a loop of reloading the solar scorcher when out of ammo
• Added an option to NPC combat control mod to allow the player to gain a positive reputation while controlling other critters
• Added a boundary check to set_terrain_name script function
• New script function: get_terrain_name