Support aggregations from 1.0+

[amontalenti]

Aggregations could benefit from query-side help, and are described here. I could imagine something like s.agg() with a chainable interface for doing sub-aggregations. Might take some effort to make nice, though.

[willkg]

In the summary you wrote "Support aggregations from 2.0". Is the "2.0" part a typo? If not, what are you referring to?

[amontalenti]

Yes, it is -- changed to 1.0+. Was just my brain malfunctioning.