v1.5.3 - Add GreenIQ support, Watering restrictions bugfix

Support of the basic valve functions of the GreenIQ Smart Garden Hub Gen2.
Currently the six valve outputs are supported (Cable 1) and mapped to zone 1-6.
The option "Pump" in the zone settings activates the master valve.

To enable the function you have to uncomment "#ifdef GREENIQ" in config.h file and select "GreenIQ" in settings (browser).
Thanks @mafes for this contribution.

In this release is also a bugfix to the watering day restrictions. Previously there were 2 implementations of the same function and only one contained the code for the day restrictions. This has been resolved. Thanks anonymous contributor ;)