Ephys Link V

[kennethjyang]

Implement Ephys Link V to reintroduce manipulator support.

1. Fork this repo: https://github.com/kennethjyang/ephys-link-v.
2. Follow the design doc in the README.md.
3. Talk to Kenneth about design decisions.
4. Implement Pinpoint V's client interface for it (Manipulator support #9).