Merging sensor

[rommess]

Hello all,

If you want to merge your old water sensor to your new sensor (to keep your long term history) and have a nice dash, you can use this integration

https://github.com/mayerwin/HA-Merge-Sensor-History

Tested and validated

[genestealer]

Hello all,

If you want to merge your old water sensor to your new sensor (to keep your long term history) and have a nice dash, you can use this integration

https://github.com/mayerwin/HA-Merge-Sensor-History

Tested and validated

Added to readme.md