Add multi.sh eventcmd
Add multi.sh eventcmd

Suggested by #191, slightly improved.

johndeeney/pianobar,DavidZemon/pianobar,twahlfeld/pianobar,tchajed/pianobar,gnowxilef/pianobar,johndeeney/pianobar,twahlfeld/pianobar,johnso51/pianobar,bmbove/pianobar-save,gnowxilef/pianobar,tchajed/pianobar,gnowxilef/pianobar,johnso51/pianobar,bmbove/pianobar-save,twahlfeld/pianobar,johnso51/pianobar,johnso51/pianobar,bmbove/pianobar-save,gnowxilef/pianobar,tchajed/pianobar,tchajed/pianobar,DavidZemon/pianobar,johndeeney/pianobar,johndeeney/pianobar,tchajed/pianobar,gnowxilef/pianobar,DavidZemon/pianobar,bmbove/pianobar-save,bmbove/pianobar-save,DavidZemon/pianobar,johnso51/pianobar,DavidZemon/pianobar,twahlfeld/pianobar,gnowxilef/pianobar,DavidZemon/pianobar,tchajed/pianobar,johndeeney/pianobar,johndeeney/pianobar,twahlfeld/pianobar,johnso51/pianobar,twahlfeld/pianobar