NickQiZhu/dc.js — pull request #474 by sclevine (2013-12-07 00:30:21+00:00)
Title: Added horizontal gridlines from right or left y-axis to composite/series charts

Fixes #451.

This adds a `.useRightAxisGridLines` method to composite charts that allows you to control which of the two axes from which gridlines will be drawn. This option is only respected when there are subcharts for both y-axes.