Shall we support date_histogram aggregation

[Colstuwjx]

Yes, esquery is a pretty cool project, and I wonder if we could add date_historgram aggregation support, see es doc.

[LironHazan]

@Colstuwjx is there a plan to merge the PR? I really want to use it :)

[LironHazan]

your code works great, too bad no one merges it in, btw should add the support for extended_bounds get's really useful when need to adjust the data for a time series line chart for e.g.