3: Done

Execute shell script

Javester requested this in october 2006 --- http://fdiv.net/2006/09/22/more-new-quartz-composer-patches/

OSC Input/Output

http://www.nervousvision.com/ requested this feature back in december 2006. I think I remember http://nosuch.com/tjt/ requesting it on the QC mailinglist a while ago, too.