Focus ring for C270

Modification for Logitech C270 to enable focus adjustment. By default, the internal Webcam focus ring is glued to provide focus range from infinite to 40 cm. This modification enable a shorter focus to put this webcam closer to the printer center.

Enhance design from 1st remix from Zoidie made on initial design by Notune21, now the focus ring have a better grip on the lense, and does not need modification of webcam lense holder.

3/18/16: Made a modification for a better grip while manipulating the ring.

08/02/16: Just realized it's possible to have multiple sources in the remix area, so I added Zoidie modified focus ring as well (QUÆ SUNT CÆSARIS, CÆSARI)