* Update back end to add MQTT and WebSocket support
* Update demo project to demonstrate MQTT and WebSockets
* Update documentation to describe newly added and modified functionallity
* Introduce separate MQTT pub/sub, HTTP get/post and WebSocket rx/tx classes
* Significant reanaming - more accurate class names
* Use PROGMEM_WWW as default
* Update README documenting PROGMEM_WWW as default
* Update README with API changes
* Re-engineer UI in TypeScript
* Switch to named imports where possible
* Restructure file system layout
* Update depencencies
* Update README.md
* Change explicit colors for better support for dark theme
