Configure Zipline for Laser Testing

[ariporad]

We need to reconfigure the Zipline for laser testing (after we get it working, see #1). Some ideas, in no particular order (feel free to suggest others!):

• Put lasers and cameras on the carriage
  • Ideally these would be eye-safe lasers
• Have a way to control the carriage remotely
• Put some sort of powerful computer (a Jetson?) on the carriage to do the processing
  • Or maybe, we want to continue to use our laptops as the brains
• Add some new vision targets that are simple shapes (ie. cubes or spheres) not fish
  • One idea was to have the carriage be bi-directional (lasers and cameras on either side of the carriage, with fish-like vision targets on one side and geometric shapes on the other side).

Some outstanding questions (thoughts welcome):

• What lasers are we going to use? Can they be made eye-safe?
• What cameras are we going to use? The Pi Cam HQs are configurable but fiddly