statistics: Duration + Count

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@7320 2b470e98-0d58-463d-a4d8-8e2adae1ed80
statistics: docu

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@7321 2b470e98-0d58-463d-a4d8-8e2adae1ed80
statistics: bugfix duration singleReadings 

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@7322 2b470e98-0d58-463d-a4d8-8e2adae1ed80
Sonos: ReportUnresponsiveDevice korrigiert

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@7323 2b470e98-0d58-463d-a4d8-8e2adae1ed80