Option to show year label on current year

[offsky]

From the demo:

Would it be possible to get the option to show the year label on the current year as well as other years?

[clauderic]

That was a conscious UX decision on my part, but I can see how you might want to override that default.

I'd be happy to accept a PR for this, though I think the same setting should probably also apply to the month overlay that's displayed as you scroll.