add .desktops for running Openbox, KDE/Openbox and GNOME/Openbox

add .desktops for running Openbox, KDE/Openbox and GNOME/Openbox
add more .desktops for gnome and update it
add scripts to run an KDE/Openbox and GNOME/Openbox session
also add scripts for openbox-gnome and openbox-kde which are placeholders and will be replaced by real programs.
also set the name on the wm_support_win to be how we were called (which is passed in the environment) rather than just "Openbox"
add an envionment variable for wanting to be notified (SIGUSR2) when openbox reconfigures. this would be used by openbox-shell to update the root window.. if i make such a thing.. i dunno.