JSON board support and Bootloader support

[CorvusPrudens]

This PR adds JSON board support along with support for the Daisy bootloader. The repo has been significantly restructured, now relying on hvcc and json2daisy as external python modules downloaded from pypi. It also brings in the recent support for various sensors.

[beserge]

There's more testing to be done, but here's a first round of stuff I found:

Install

• [x] Had to change python3 to python in install.sh. This is a peculiarity with my setup but we should probably let users know this might be something they have to tweak
• [x] venv drops activate in `pd_env/Scripts' so I had to change install.sh to reflect that. Once I made those changes everything worked great!

Usage

• [x] In the readme under usage you list (seed, pod, patch) as the available boards. This should be updated.

Pod

• [x] The readme lists CV, gate and spdt that the pod doesn't have.
• [x] led2 seems to have its blue stuck on.
• [x] I tried sending directly to led1 and got the error: clamp not declared in this scope . Not sure if I was using that improperly... Perhaps that has to be updated to fclamp. Not sure. After more testing: it seems like those weird extra cv, gate, and sw3 were the cause of the stuck on led2_blue.

Patch

• [x] Knobs are backwards! I'm pretty sure the controls have a reverse Init argument or something.
• [x] The Gate IO worked fine just passing through, but the gateins don't trigger the envelopes for me in the example.

Petal

• [x] There are some leds stuck on: fs 2, 3, 4. enc 4, 7, 8.

Field

• [x] The keyboard leds are jumbled, the names don't match the leds.
• [x] The key names are jumbled as well. The field has a mapping from int -> key / led that isn't 100% intuitive so it seems like you just naively passed the int along without mapping.
• [x] Gateout doesn't work. Tried passing through gatein and sending it a metro.
• [x] The readme lists led_sw1 and led_sw2. These don't exist.

  patch.Init()

This one works great! Nice work!

Etc

• [x] The patches that use the line envelope thing crackle. This happens on the desktop as well, but it would definitely be offputting to newbies.

Day 2 stuff (don't worry about this for now)

• [ ] Should consider having the leds have some default behavior if the user doesn't explicitly use them.
• [ ] I'm sure we'll also thinking about doing some default oled stuff the same way oopsy does.

[stephenhensley]

The patches that use the line envelope thing crackle. This happens on the desktop as well, but it would definitely be offputting to newbies.

This can be resolved by using line~ instead -- essentially using any non~ objects for things like amplitude, delay time, etc. will result in noticeable zippering effects (quantization error).

[beserge]

Field issues are confirmed fixed. The petal still has led issues. There's a PD file attached to the trello card you can use to test that. I don't have a patch and pod on hand to test with atm, but based on reading over the changes I strongly suspect those issues are fixed.

The new install script worked great. We should add a note in the readme about the Scripts folder rather than bin on windows.

[beserge]

Pod, patch, and petal confirmed fixed! Let's get this released! 💯💯💯

[stephenhensley]

let's do it!