mleibman/SlickGrid — pull request #602 by fnordpig (2013-05-11 14:13:04+00:00)
Title: Add unique and weighted average aggregator, date formatter

Provide a unique aggregator and weighted average aggregator with
example usage. Provide a date formatter.

Weighted average requires a thing to average and a weight column. This is the first tuple aggregator, but it seems like the api is reasonable.