Bug #1189 fix by scrawl
Feature #50: Spawn projectiles

Fix a bug in copyObjectToCell.
Make actor rotations more consistent.
Feature #50: Implement marksman mechanics.
(#1191) Disallow picking up if inventory disabled

Check if window manager has allowed the inventory window
if not, then items should not be possible to pick up
Small fix for terrain
Fixes #1181: Enable controls when loading a savegame