Add support for Android 2.3+

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!

src/modalMenu.h

@@ -21,6 +21,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define MODALMENU_HEADER
 
 #include "irrlichttypes_extrabloated.h"
+#ifdef HAVE_TOUCHSCREENGUI
+#include "touchscreengui.h"
+#endif
 
 class GUIModalMenu;
 
@@ -101,6 +104,10 @@ public:
 		Environment->removeFocus(this);
 		m_menumgr->deletingMenu(this);
 		this->remove();
+#ifdef HAVE_TOUCHSCREENGUI
+		if (g_touchscreengui)
+			g_touchscreengui->Show();
+#endif
 	}
 
 	void removeChildren()