Node-BLUE changelog

In progress

Proof-of-concept and documentation, with software tests
Add program node-blue setup, to install JavaScript prerequisites
[fm] Add Node-BLUE flow manager and provider
[cli] Add --listen command-line option
[fm] Add JSON5 flow example, converting temperature from imperial to metric
[fm] Add YAML flow variant of the JSON5 variant
[js] Rename bootstrap file minired.js to blue.js
[core] Improve Node-RED bootloader
[lang] Add "Droste", to assist running Python and Lua code on Node-RED
[lang] Enable writing user-defined functions in Python
[js] Convert wrapper blue.js to an ES6 module blue.mjs
[js] Improve bootstrapping / module loading / importing
[js] Refactor blue.mjs to use OO
[js] Add package.json and guidelines to satisfy JavaScript prerequisites
[example] Add MQTT-to-CrateDB example flow