Removed all LWJGL Dependencies as well as the original LWJGL classes for
displaying the game.

Updated GUI. Separated NPCList into its own class and created an
abstract GamePanel class that all GUI's should inherit from. It's very
fragile atm and needs work.
Merge pull request #39 from sethmoon/swing_gui

Removed all LWJGL Dependencies as well as the original LWJGL classes for