e-NABLE Phoenix Hand v2

This is a remix of the original e-NABLE Phoenix hand by Jason Bryant with replacement components by John Diamond, Scott Darrow and Andreas Bastian. A full assembly guide is included. The changes from the original are as follows:

* Gauntlet - Original fully 3D printed version replaced with a thermoformed equivalent (lighter, stronger, uses less filament, quicker to print and can be adjusted to better fit the forearm)
* Gripper box components - Whippletree doesn't require tying to the swivel pin using string. The printing support from the swivel pin should be cut/snipped/filed off before assembly. The thumb tensioner pin is shorter so it doesn't need to protrude from the front of the gripper box.
* Thermoformable palm mesh - An easier to assemble alternative to using Velcro in the palm. Can be thermoformed and adjusted to fit the recipient. Two alternative versions, thin/thick, are provided.
* Palm with supports - The support structure uses less filament than the original and can b