lynaghk/c2 — pull request #28 by jblomo (2012-11-24 06:49:28+00:00)
Title: Histogram layout modeled roughyl after D3's

Is the plan to continue adding layouts to get parity with D3? If so, here is an initial implementation of histogram. Main differences:

- Like layout/partition, histogram is a function instead of a builder
- Return values are vectors with metadata (keys :x :dx :y)
- No :frequency option
- default :value function is :value (instead of D3's Number)