Thor Gripper - Remix

Gripper remixed from [Robot Gripper with three fingers for Chess Robot](https://www.thingiverse.com/thing:1322867) made by [maquina_pensante](https://www.thingiverse.com/maquina_pensante). Such a cool mechanism!

I have migrated the design to [FreeCAD](https://www.freecadweb.org/), an OpenSource CAD software. Source files uploaded.
Added a new piece to fix the grip to [Thor robot](https://www.thingiverse.com/thing:1743075).
Also, modified the servodisk piece to fix it to a modified 2 arms servo horn.

Some models like servomotor and lock-nuts and the are from [FreeCAD library](https://github.com/FreeCAD/FreeCAD-library)

Hope you like it!