Star Tracker

WIP.

Gears: new design based on http://www.thingiverse.com/apps/customizer/run?thing_id=6544

Ancilary items: simply split original STL files in 4 separate files.

Dolica Quick Release based on https://www.thingiverse.com/thing:1729344/

Software for arduino available here : https://framagit.org/marc/startracker