merging back from Xose

- wrapper NTPClient class to avoid inadvertently calling NTP::getTime() while
setting things up
- only call NTP::getTime() when in loop(), install async TimeLib
sync provider and manually set TimeLib time
- randomize sync and delay times

Mine was not working till I added BUTTON_SET_PULLUP | BUTTON_DEFAULT_HIGH

* Add reactive power calculation and bring output to in line with HLW8012 sensor based units

* Update CSE7766Sensor.h

Improve readability

fixes #1621

* Added LITESUN LA-WF3 support.

Support for LITESUN LA-WF3 / Costco Charging Essentials wall socket.

* Added LITESUN LA-WF3 support.

Support for LITESUN LA-WF3 / Costco Charging Essentials wall socket.

* LITESUN_LA_WF3 hardware.h

* LITESUN_LA_WF3 platformio.ini

* Added Teckin SP20 Power Plug

* Added Teckin SP20 to hardware

# Conflicts:
#	code/espurna/config/webui.h
#	code/espurna/data/index.all.html.gz
#	code/espurna/data/index.light.html.gz
#	code/espurna/data/index.rfbridge.html.gz
#	code/espurna/data/index.rfm69.html.gz
#	code/espurna/data/index.sensor.html.gz
#	code/espurna/data/index.small.html.gz
#	code/espurna/espurna.ino
#	code/espurna/static/index.all.html.gz.h
#	code/espurna/static/index.light.html.gz.h
#	code/espurna/static/index.rfbridge.html.gz.h
#	code/espurna/static/index.rfm69.html.gz.h
#	code/espurna/static/index.sensor.html.gz.h
#	code/espurna/static/index.small.html.gz.h
#	code/espurna/web.ino
#	code/gulpfile.js
#	code/html/index.html

1. Add thermostat to the espurna_modules in progmem.h
2. Add thermostat to webui, gulp, html, js.
3. in general.h MQTT_USE_JSON returned to 0 by default and 1 if thermostat enabled.

fixes #1606

When ON domoticz sends:
value >= 1 for lights
value == 1 for basic switches

LightFox dual support

Allow to set relative brightness and relative color in mireds through…

* Implemented HAMA outlet model number 00176552. There is a identical one looking exactly the same but with different part number

Signed-off-by: Markus Rudolf <info@markusrudolf.de>