add auto bootup files recipe.

	new file:   recipes-fluxbox/fluxbox-session/files/COPYING
	new file:   recipes-fluxbox/fluxbox-session/files/session
	new file:   recipes-fluxbox/fluxbox-session/fluxbox-session_0.1.bb
enable fluxbox auto start.
add DEPENDS section.
	modified:   recipes-fluxbox/fluxbox/fluxbox_1.3.5.bb
	modified:   recipes-fluxbox/images/fluxbox-image.bb