Minor Bugfix 0.4.9

There's nothing exciting here, but I did fix a bug that greatly increases performance if your world has a large number of items laying on the ground. [b]Changelog:[/b] [list] [*] Optimized for areas with large numbers of items [*] Added option to disable warnings on structures [*] Added warning when get the dishonored one quest that it locks the science path ending (if you haven't already done so) [/list]