VisiCam enclosure mount

Parametric mount to mount the VisiCam enclosure in a lasercutter.

Has two mount methods:

1. simply with nuts trough the lid of the lasercutter.
2. reuse the nuts behind a handle in the lid of the lasercutter.

VisiCam enclosure:
http://www.thingiverse.com/thing:183621

More on VisiCam:
https://github.com/t-oster/VisiCam/wiki

New version: http://www.thingiverse.com/thing:208947