New Features:
GPIO "Run" status output (not standby)
RSSI of STA connection
STA gatewayIP
Only run as "active" controller when changes to fuel mixture etc for a short while.
Timed moderation added for frequently changing JSON vars
Altitude & Humidity via JSON
JSON reboot (mainly for MQTT clients)
Bug Fixes:
Cyclic not enabled when frost start
LVC holdoff added for "starting car" situation
Better handling of string and float NV Storage defaults
FrostRise limits 1-30 now 0-30
Handle spaces in SPIFFS file uploads
Replaced ` with clean degree symbol in standard font & arial 8
Removed temp offset from fuel cal screen
GUI alignment tweaks to avoid cutoffs
Better handling of single DS18B20 with BME280
Added bounds limits to Exponential Mean
Sorted inheritance from CSensor properly
Modded code to only allow single DS18B20 - getting funny ROM SEARCH lock ups...
Set mini temp sample interval to 750ms, as per data sheet for 12bit DS18B20
