Add support for divideSeriesLists

[shanson7]

No description provided.

[Dieterbe]

do you think it would make sense to use the same implementation supporting both divideSeries and divideSeriesLists ? from the docs, looks like the only difference is whether the divisor is a single series or not. (i'm not saying that would be the better way, i'm happy to merge whichever approach you think is better)

[shanson7]

I did think about that, but was worried that handling the validation would get a little messy. Let me quickly mock up the approach and see what it looks like.

[Dieterbe]

yeah that was also my concern. sometimes it's better to have more code if it's simpler.
anyway don't spend too much time on that, i was more thinking out loud than anything.

[shanson7]

The logic to support iterating over the divisors in the list case is a little annoying, but the actual division and series creation stuff could be factored out into a shared implementation. I'm not sure where the best place to stick that would be.