Touchscreen Upgrade for Printrbot Simple Metal

I had this for a while, and I actually feels it is quiet practical. So here it is, the touchscreen upgrade to run Octoprint on your Printrbot Simple Metal!

Check out what Octoprint is here http://octoprint.org/

**UPDATE:**
**(25/08/2016) new image based on jessie octopi 0.13.0, compatible with RPi3, bring back user access control, octoprint 1.2.15, touchUI 0.3.4**