Beta release

This release has been accepted with the following Netro devices : Sprite, Pixie, Whisperer.
Tests have been performed in combining multiple controllers and sensors, within several configuration sets.

The major functions have been implemented so that sensors, controllers and zones provide their information : humidity, temperature, illuminance, battery percent, last watering et next watering date, source and status.

Actions are also available that allow to start/stop irrigation, zone by zone or all zones at once.

HA custom services have not been provided yet. This will be done in future versions.

Despite the care taken, this version is still fragile. I look forward to obtaining user feedback on the level of reliability and the functional richness in order to open up new areas for improvement.

Thanks