16th release: Lots of improvements: NTP, OT message parsing, Wifi-reconnect

Already the 16th release, and moving to the v0.9.x releases. This release is merging many small enhancements I made over the last months based on feedback from users in the Discord. Thanks to all of the discord members that joined the discussion over the last year, that help me come up with improvements to make the firmware stable and robust. This release focused on fixing OT message parsing, wifi reconnection handling, NTP source handling and it improves the Home Assistant reconfiguration on upgrade of HA Core.

All in all this release should serve as a stable release for the time to come. I moved to v0.9.0 to signal that it's a release that is worthy of your time to upgrade. It also does fix some weird / obscure webUI bugs that where reported. And the whole OT message parsing is improving still.

Release list of notes:

• New: NTP hostname now configurable, setting in webUI
• New feature: Adding time setup commands for Thermostat (SC command usage)
• Fixed: Improved OT status (incl. VH and Solar) message decoding
• Fixed: Statusbit decoding in webUI
• Improved: Better wifi auto-reconnect (ESP based)
• Improved: Wifi reconnection logic, reboot if 15 min not connected
• Changed: removed ezTime NTP library, moved to ConfigTime NTP and AceTime
• Improved: Moved a lot of string to flashmemory and lots of small stability enhancement and bufferoverflow fixes.

Any feedback, issues, suggestions, improvements, wild dreams, or compliments can be given at any time. Also I do accept Pull Request to improve this futher. Hope you enjoy this release as much as I do.