[Fuze+] PictureFlow: complete keys mapping

1) add quit and menu binding
2) complete manual

Change-Id: Iceee6354c788b8baeefeea2d2d8914e1df83d4a7
Reviewed-on: http://gerrit.rockbox.org/353
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>
2 files changed