Added a main menu and fixed som things. added explotions to and fixed the economy

src/ei/engine/state/GameState.java

@@ -1,16 +1,22 @@
 package ei.engine.state;
 
+import ei.engine.LWJGLGameWindow;
 import ei.engine.input.InputHandler;
+import ei.engine.renderer.Camera;
 import ei.engine.util.MultiPrintStream;
 
 public abstract class GameState {
 	private String name;
 	private InputHandler input;
 	private boolean enabled = false;
+	private boolean init;
+	private Camera cam;
 	
 	public GameState(String name){
 		this.name = name;
 		input = new InputHandler();
+		init = false;
+		cam = new Camera();
 	}
 	
 	/**
@@ -28,6 +34,15 @@ public abstract class GameState {
 	 */
 	public void setEnabled(boolean b){
 		enabled = b;
+		if(enabled){
+			if(!init){
+				init();
+				init = true;
+			}
+			if(LWJGLGameWindow.getCamera() != cam){
+				LWJGLGameWindow.setCamera(cam);
+			}
+		}
 		MultiPrintStream.out.println("Enabling("+b+") State: "+getName());
 	}
 	
@@ -63,6 +78,8 @@ public abstract class GameState {
 		input.render();
 	}
 	
+	public abstract void init();
+	
 	public abstract void update();
 	
 	public abstract void render();