Add PowerUpType enum

Handles weighted random seletion, color and instantiation, cleaning up
other sections of Brick and PlayState code.

desktop/src/com/me/brickbuster/desktop/DesktopLauncher.java

@@ -10,6 +10,8 @@ public class DesktopLauncher {
 		config.width = 450;
 		config.height = 800;
 		config.title = BrickBuster.TITLE;
+		//config.vSyncEnabled = false;
+		config.foregroundFPS = 0;
 		new LwjglApplication(new BrickBuster(), config);
 
 	}