Lighter camera options

[smathermather]

In the future, as we think about weight and deployment options, it might be worthwhile to look at alternative camera options, e.g.:
https://www.uctronics.com/camera-modules/camera-for-raspberry-pi/arducam-12mp-imx477-mini-high-quality-camera-module-for-raspberry-pi.html

[smathermather]

This is the same sensor, but a cell phone lens, which makes for a much smaller and lighter set-up.

[hcwinsemius]

now under #163, closing this issue

[smathermather]

Strictly speaking, this was an issue for going smaller and keeping the pi API stuff. This is just a hardware change, no other changes needed to the stack. I will re-open, as it's quite a different issue from #163.