allow adjusting volume, centralization of some code (#688)
allow adjusting volume, centralization of some code (#688)


fmarchenko/i3pystatus,facetoe/i3pystatus,fmarchenko/i3pystatus,teto/i3pystatus,drwahl/i3pystatus,teto/i3pystatus,facetoe/i3pystatus,enkore/i3pystatus,Arvedui/i3pystatus,Arvedui/i3pystatus,enkore/i3pystatus,drwahl/i3pystatus