Eurom Sani Wall Heat 2000: add docs

docs for PR #313

ACKNOWLEDGEMENTS.md

@@ -149,3 +149,4 @@ Further device support has been made with the assistance of users.  Please consi
 - [SvenMartin81](https://github.com/SvenMartin81) for assistance supporting another variant of common smartplug (via GNCC branded one)
 - [cjones813](https://github.com/cjones813) for assistance supporting HJZ radiators, and contributing Benexmart blinds support.
 - [cnrd](https://github.com/cnrd) for contributing support for Eeese Otto dehumidifiers.
+- [markwellis](https://github.com/markwellis) for contributing support for Eurom Sani Wall Heat 2000 heaters.

DEVICES.md

@@ -9,6 +9,7 @@
 - Ecostrad Accent iQ heating panels
 - Ecostrad iQ ceramic radiators
 - Eurom Mon Soleil 300,600,800, 350,601,720 and 300,450,720 Verre heaters
+- Eurom Sani Wall Heat 2000 heater
 - Eurom Wall Designheat 2000 heater
 - Goldair heater models beginning with the code GPPH, GCPV, GECO
 - HJZ oil column radiator