Added dialog utility classes, to help creating scripted dialogs.
Added proper enter_x;enter_y coordinates in the Nexus.
Corrected a glitch in IPO Colette's answer.
Updated weak wall images, solving bug #1518263 ("Arch wwall_weak_1 incorrect graphic style")
Replaced the "front" view of the booze by a "skewed" version, to match
Kept the "flat" version of the booze bottle for the classical set,
Fix for bug #1518397 - Arch awall_w_0.111 graphic needs rework.
Add support for the "give" command, that allows a player to show an item to an NPC.