Merge pull request #5 from Splinti/master

Improved detection if set_command is available + redesigned comment
code cleanup, hopefully :P
replaced output command by displayinfo
fix song info not being updated
forgot one string
Bugfix: make sure that there is a command after the controlstring. Thanks to splinti :)
Merge branch 'master' of https://github.com/Natenom/mumble-ruby-related
Fixed comment-output