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

scene/gui/line_edit.cpp

@@ -572,7 +572,7 @@ void LineEdit::set_cursor_pos(int p_pos) {
 //	set_window_pos(cursor_pos-get_window_lengt//h());
 //	}
 	
-	if (!is_inside_scene()) {
+	if (!is_inside_tree()) {
 		
 		window_pos=cursor_pos;
 		return;