max-skel-conf: (7.0.max61)

  * Remove lightdm.conf from diverts and use lightdm-set-defaults to edit it
  * Add etc/X11/Xsession.d/01-max-double-login and usr/bin/max-check-double-login, close #464
  * Add usr/lib/update-notifier/package-data-downloader to force download flash plugin with proxy
  * Add vacio.png for gnome-panel background