v1.18.0

Fixes from a review of this plugin and EvoHome Heating Controller together.

• A change made by hand is never undone by a retry. If someone changed a zone at the controller, on a valve or in the app while one of Indigo's settings was still waiting to be confirmed, the plugin used to send its own setting again a minute later, over theirs. Now the change by hand cancels it. One of Indigo's own earlier settings arriving late is still recognised as Indigo's.
• Changed By is right when the temperature is reported first. The controller sometimes reports a new temperature before its full report of the zone's setting. The plugin then missed the change and kept the old Changed By and Changed At.
• Set Temperature for a While tells a script whether it sent. Called from a script, it now answers whether the setting left for the gateway, and why not if it did not. EvoHome Heating Controller 1.25.0 uses this.
• Times survive the clocks going back. A new zone state, Changed At (seconds), gives the moment of a change as a count of seconds, which the repeated hour cannot confuse. A setting for a number of minutes now lasts that many real minutes on the night the clocks change.
• A failed timetable read waits an hour. It used to start again at once, all day. It now tries again an hour later, up to three times a day, and the log says when.

Install: download RAMSES_ESP.indigoPlugin.zip, unzip it, and double-click RAMSES_ESP.indigoPlugin.