MQTT parameter exchange via JSON and NV storage

retrieve/save details should work once Ray creates nvRam hooks for the code:D

OTA was not rebooting after AP only update

Seeing 10 second WiFi timeout if BT & WiFI client active, reversed order so Websocket now sends before BT
  - very much more stable now
  - smacks of a UART ISR causing issues with socket kernel code...

Added adjustable -ve threshold for Jess mode (cyclic shutdown if over temp).
Added user selectable display blank, dim or do nothing option on keypad inactivity.
Added user selectable menu timeout on keypad inactivity.

Version information screen
Adjustable frame rate
User selectable default menu
Extra large fonts for clock and basic menu

Repeating timers were being cancelled!
Set time always advanced by one day upon entry.
Desired temperature was incorrect when using enhanced thermostat modes in Detailed menu

Added board detection to solve setup of GPIO of modded vs unmodded V2.0 PCBs and inversion of inputs on V1 PCBS.

Tidied alignment of OTA & CFG/AP against Wifi icon

OTA now shows in screen header against Wifi icon.

Quite a tidy interface now.

Very tidy and easily extensible now.