Split Main class and Game-logic code.
Changed dependency from "RoujoLib project" to lib/RoujoLib.jar
Fixed drawer reinitialization.
Added .sprites package, moved Sprites there.
Switched input management from KeyListener to KeyEvenDispatcher. This is
wonderful.
Refactored KeyStates, they're now UP, DOWN, PRESSED and RELEASED
Added basic entities.
Added Drawer.draw(Entity entity) and DrawerG2D support.
Added basic player movement. They can go Left now. Yay~~