populate zeroconf/avahi/bonjour records via json api (#419)

* start of integrating a bonkour service browser

* some experiments

* blub

* bonjour browser via jsonrpc ...

* fix indention

* - make leddevice as component
- extend sysinfo with domain
- add more data for  bonjour browser (e.g. split domain and hostname)

* code cleanup

* add translation

* use component names instead of ids

* fix compile

include/utils/SysInfo.h

@@ -18,6 +18,7 @@ public:
 		QString productVersion;
 		QString prettyName;
 		QString hostName;
+		QString domainName;
 	};
 
 	~SysInfo();