Fixes and additions for sawfish.wm.prg / autostarts

Hi folks,

in the latest commits I made some changes to sawfish.wm.prg.*

a) fix that start-* won't work when stop-* was called beforehand
b) add nm-applet.jl: auto-starter for the network-manager applet
c) add diodon.jl: auto-starter for the diodon clipboard manager
d) several fixes and more robustness for the wallpaper setter

So I wonder what applications are people using on to aid their workflow? 
We have auto-starters for compton, trayer, xsettingsd aswell as compton 
and others. Are where any fancy applications outwhere I'm not aware of? 
If so, feel free to comment.

Regards,
Chris

-- 
Sawfish ML