host_name instead of host_display_name for Icinga JSON (see http://sourceforge.net/p/nagstamon/bugs/83)
Merge branch 'master' of github.com:HenriWahl/Nagstamon
Merge branch 'master' of github.com:HenriWahl/Nagstamon
Merge branch 'master' of github.com:HenriWahl/Nagstamon
Merge branch 'master' of github.com:HenriWahl/Nagstamon
some cleaning