add ned_waits_boost.nanim
ned_waits_boost nanim is load.
add ned_mount.nanim
Little name change.
Animation play ONCE
After blue maki push ned_wait_animation is run.
Load ned mount stairs animation
update and add menu pictures ; update menu_buttons.nanim
add menu_audio.png
Correct error, create by the next commit.
Add access, of Sprite.
Add move on mount stairs animation.
Code clean up.
No atomic commit sorry :

* Game system, isn't artemis system.
* IngameInputSystem test if need return at LevelMenu.
add menu_video.png
add default_menu.png
set default menu background