Rename calendar switch to cycling

[arjclark]

As per the earlier meeting, this renames "calendar" to "cycling mode".

[arjclark]

@benfitzpatrick - please review (and test just in case!) asap.

[benfitzpatrick]

I think the [scheduling]cycling option was intended to be renamed
cycling mode here, so that you get e.g. allowed options of integer,
iso8601, 360day.

[arjclark]

[scheduling]cycling option?

[arjclark]

Discussed with @hjoliver - will move all into one accordingly

[arjclark]

@benfitzpatrick - now all unified into the [scheduling]cycling option.

[benfitzpatrick]

I've tested it, and cycling mode is definitely possible - a quick name change
would be good. See e.g.:
benfitzpatrick@145299e15
for my testing commit.

I also think '360' should indicate that it is date-time related,
somehow.

[arjclark]

@benfitzpatrick - done.

[hjoliver]

I think '360' should be '360 day'...

[arjclark]

@benfitzpatrick - 360 day....

[hjoliver]

huh? I mean cycling mode = 360 day (open to discussion of course)

[arjclark]

Understood. Had just had a conversation with Ben about that.