Remixed Webcam Support

This is a remix of Ott3rman's brilliant Webcam holder / stand. I use mine for time-lapse and monitoring of my Printrbot using Octopi.

Please fetch the original files from Ott3rman, I've only updated the file #6 here.

I put a rib on the part to stiffen the vertical support. This partially reduces camera wobble induce by printer vibrations.