- various visual improvements and fixes
- show graph (topology) in device and location views
- make topology view use svg, pan- and zoomable
- make locations nestable (a location can have many sublocations)
- rename slots to ports everywhere (issue #7)
- topology view: allow configuration of spline, rankdir, ports and boxes
- friendly_id for nicer URLS (https://.../devicename instead of ../23123)
- various visual improvements and fixes
- expose CHANGELOG
- fix Device#kind select in device form
- show Device#url in device overview/index table
- fix location view when more than 3 devices are shown
- initial somewhat useable version