Dumbo 9000

This is a tentacle inspired by Richard 9000. Strictly speaking, this incarnation is not a derivative, rather it is more like a clone.

Similarities:
* It's a tentacle
* Uses PTFE tube and fishing line
* Uses 16-channel servo driver driven over I2C
* Uses 16 servos to drive 16 degrees of freedom
* Green in color
* Ran out of PTFE tube partway through construction

Differences:
* Cables will be Dyneema fishing line for high strength, minimal stretch
* Each joint is one degree of freedom instead of two, meaning 16 joints instead of 8
* Joints use metal pins as bearing element
* Joints and pulleys have printed features for securing cables, which work quite well
* Uses smaller, cheaper servos with tension amplified via capstan (not yet implemented)

The purpose of this robot is as a proof-of-concept for driving many degrees of freedom with relatively strong force at low cost. If viable, the natural application would be a large-ish hexapod or perhaps biped. Hexapods and b