Supports multiple Recalbox !

This version is the first version to fully support mutiple instances of Recalboxs in the same local network !
Thanks to mDNS, in Home Assistant we try to get Recalbox IP. When a MQTT message arrives from Recalbox,
it now contains the Recalbox IP address (from itself), we can then check, when receiving it, to which instance
it was sent to.

The Recalbox script has changes and needs to be updated.
If the script version in < 1.4.0, please upgrade !
(a message will be displayed in the Recalbox card).

• Clean recalboxIpAddress and scriptVersion switch attributes
• In the HA model, return to 'None' fields values, instead of "-" that was not consistent
• Support multiple Recalbox
  • Simplify MQTT messages : a single message from Recalbox to Home Assistant contains status + game attributes, instead of 2 messages before
  • On message received, checks the IP address of each Recalbox host, to check if the message comes from this Recalbox
• Display a message if the script installed on Recalbox needs to be upgraded