Container Facing, Constants

containers now have a facing so that you can only open them if facing
their correct side; replaced stray values with constants; character menu
no longer creates a pause image - this is way too slow and doesn't
stretch reliably over various view sizes; fixed schedule create
functions to refer to caster's direction, explicitly
NPC Dialog System Stub

part way through implementing dialog system
Conversation System

now complete except for "random" text, which will be played when "talk"
option is selected from an NPC menu; conversation system includes
portraits (with different facial states), typewriter-style text (with
speed through on button hold), skip on cancel button, and dialog
navigation; also works with gates and keys
Conversation: Random Chat stub

Stub for "random chats" from npc menu