Talon Flextensor 1.0

As requested, the Flextensor 1.0 has been released!
This is intended as replacement fingers for a person with a wrist and palm, but no digits, most commonly the congenital amputation Amniotic Banding Syndrome (ABS). It lacks the elastics common to this type of assistive device. There are two main reasons for a mechanical extension system:
1. With elastic systems, the user fights resistance. Furthermore, the smaller an object the device grasps, the greater the resistance from the elastics. Mechanical extensors lend the user much greater strength, especially when grasping small objects (ie. those which require greater flexion)
2. Elastic systems only engage the flexors of the wrist, which can lead to unbalanced anatomy and repetitive strain. The Flextensor relies on both the user's wrist flexor and extensor muscles, which should be preferable from a therapeutic standpoint.