Resolved warnings; made collections generic.
Items can now be assigned to the hot-key bar.  The player will use the
selected item.
HotKeyViews now display the tile at the correct scale, with the key name
displayed in the lower-right.
Enabled multiple text wrapping modes through the
[get|set]TextWrappingMode method.
Gave access to the message label through the getMessageLabel method.
Render chunk generation status to a message box.
Split the sub-states of GameplayState into their own GameState
instances.
Organized all game states around the GameStateManager class.
Moved math-related classes into the asciiWorld.math package.
Moved math classes into the asciiWorld.math package.
Miscellaneous bug fixes.