SceneMainLoop -> SceneTree

-=-=-=-=-=-=-=-=-=-=-=-=-=-

*YOUR SOURCE MIGHT NOT WORK*
For mor information on fix:
https://github.com/okamstudio/godot/wiki/devel_scene_tree

Other stuff:
-Shower of bullets demo
-Fixes all around

bin/tests/test_gui.cpp

@@ -58,7 +58,7 @@
 namespace TestGUI {
 
 
-class TestMainLoop : public SceneMainLoop {
+class TestMainLoop : public SceneTree {
 
 
 	Control *control;
@@ -72,7 +72,7 @@ public:
 	}
 	virtual void init() {
 	
-		SceneMainLoop::init();
+		SceneTree::init();
 
 
 #if 0