The single unique identifier of Somfy Gateways is the Gateway PIN that
the device announces via zeroconf (txt + hostname). There's no point in
setting two params to the same value.
Note that due to a previous mistake this fixes also getting the IP
via zeroconf, because the old code was comparing against an incorrect
identifier.
Add support for controlling Somfy smart home devices through their
Tahoma box (and the Somfy API).
The plugin currently contains support for roller shutters as well as
for venetian blinds.
