maps: design fix
maps: create a basic network map. Need some extra features and tests
maps: add icinga states (need that the icinga name is same as device name)
bugfixes on maps & icinga
maps: preimplement algo to check bw usage on net map
maps & cleanup: netmap is now a Springy map (need some more improvements but it works). Also cleanup old crontab entries
usermgmt: Add autocomplete for Active Directory fields to LDAP form. Also add little perf improvements