Added base class for button listening

Fixed a few memory leaks

ButtonListener.h

@@ -0,0 +1,18 @@
+#pragma once
+#include "TextButtonInstance.h"
+class TextButtonInstance;
+class ButtonListener
+{
+public:
+	ButtonListener(void);
+	~ButtonListener(void);
+	virtual void onButton1MouseClick(TextButtonInstance*);
+	//virtual void onMouseOver(); //TODO
+	//virtual void onMouseOut(); //TODO
+	//virtual void onButton1MouseDown(); //TODO
+	//virtual void onButton1MouseUp(); //TODO
+	//virtual void onButton2MouseClick(); //TODO
+	//virtual void onButton2MouseDown(); //TODO
+	//virtual void onButton2MouseUp(); //TODO
+	//What to do now...
+};