Reference used 3rd party content

# Used third party content

## pinout.xyz

We adapted the excellent pinout.xyz to generate the interactive and static wiring diagrams.

- Files: `docs/wiring/*`

    - Modified version of [pinout.xyz](https://pinout.xyz/)

    - GitHub: https://github.com/pinout-xyz/Pinout.xyz

    - Maintainers: [@Gadgetoid](https://github.com/Gadgetoid) and [@RogueM](https://github.com/RogueM)

    - License: [CC BY-SA 4.0](https://github.com/pinout-xyz/Pinout.xyz/blob/master/LICENSE)

## Fira Sans

- Files: `poolpay/ui/pygame/resources/FiraSans/*`

    - Authors: The Mozilla Foundation and Telefonica S.A.

    - License: [SIL OPEN FONT LICENSE Version 1.1](./poolpay/ui/pygame/resources/FiraSans/OFL.txt)

## Strategy to write to Framebuffer display with PyGame

Adapted from an excellent Stack Overflow answer / Raspberry Pi Forum post:

- [Answer to “Python pygame fails to output to /dev/fb1 on a Raspberry Pi + TFT screen”](https://stackoverflow.com/a/54986161/)

    - Author: [Attila](https://stackoverflow.com/users/1327762/attila)

    - License: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)