docu fix


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4569 2b470e98-0d58-463d-a4d8-8e2adae1ed80
added valueColumns attribute


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4570 2b470e98-0d58-463d-a4d8-8e2adae1ed80