Custom timeFormat on the time axis

[pdf]

It looks like the format prop that's passed down to the TimeAxis only supports a few predefined values. I'd like to retain the multi-scale formatting that's used by default, but with 24hr time (why they chose zero-padded 12hr time by default in d3-scale escapes me). If I could pass a func per the d3-time-format docs, I think that would work?

[pjm17971]

Seems reasonable. I'll try to make that change for the next release.