Version 0.2.0 - alpha release

Trending to be alpha version release
Issues I know about:

1. Does not support setting valve end points via buttons. However it will take old FW values so any previous setup will be retained. Also endstops can be set (and are saved to EEPROM) via RS485 commands
2. When valve is moving if RS485 packets sent to valve will generally be dropped
3. Valve doesn't respond to buttons while moving