Octoprint camera support

Support for Raspberry Pi official camera. When used with Octoprint, it is advisable to set this settings for right picture orientation:

Features > Webcam & Timelapse:

* Flip webcam horizontally
* Flip webcam vertically
* Rotate webcam 90 degrees counter clockwise

Small wedge is fastened with double-sided tape and main wedge with one of the screws of PCB.

If the fixing between camera module and main wedge it is not enough, apply some hot glue over small cylinders.

This mounting was done on a Anet A8 printer, but it should be easily adapted to other similar printers.

When used with Raspberry Pi Zero, you will need the special cable version. In that case, it will be enough with 16cm version.

In [this post](http://apuntes.eduardofilo.es/2018/10/20/Octoprint-en-Anet-A8.html) (in spanish I'm afraid) there is instructions for installing a Raspberry with Octoprint in Anet A8.