Add concept of "Areas" (groups of Tiles). Doesn't do anything yet.
Cleaning up code in the Tiles. Added custom cursors.
Make cursor appear on top. Hide popup if anything else is clicked.
Renamed "Popup Menus" to "Secondary Menus". Change the way Tiles specify what type of construction they allow.
Add a centralized config.
Cleaned up GUIManager. Added menu to show construction options. Added object previews after ordering construction, before construction completes.