Changelog

increased stability
switched to AsyncWebserver
improved API (JSON)
deliver html as static pages with asynchronous XHR requests
improved MQTT message handling
improved plausibility checks on payload (length of message is used now)
improved message queue and their parsers
added serial web console
added night communication pause (sunrise and sunset)
moved power limit from setup to serial page
improved web GUI (responsive and central menu)
added button for homeassistant autodiscover in setup (not sent automatically any more)
added wifi RSSI to index
added feature to scan Wifi in settings for easier setup
fixed negative tempertures from inverter (was not correctly interpreted in last version)
added RX no answer counter
improved DTU ID, is now generated from MAC of ESP
added feature to synchronize time from browser
added styleguide for code
fixed several bug reported in Github

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