Release 2.1

A new year, a new release.

Modbus: - Thermia Mega updated to support software version 2.00.00 - Verified communication with Thermia Mega XL pump controller - Nibe F1345 update to latest register database - Grundfos Cim 200 workaround for odd data points - Update to support more modes on Corrigo Ventilation - Adjusted conversions for Ziehl Abegg including temperature control

Mbus: - Support reading error states - support units with 10+ storage numbers

Firmware: - Operator rewritten in Pyramids + Python3 - custom webserver replaced with nginx - finalise porting of Python2 to Python3 on devices