set value to 0 if series data doesn't have that key, as column charts can't have nulls
set value to 0 if series data doesn't have that key, as column charts can't have nulls
Merge pull request #22 from ygelfand/master

highcharts doesn't like null values in data for column series, results in 'x is undefined'
Fixed issue w/ library option - closes #23
Merge branch 'master' of https://github.com/ankane/chartkick
Upgraded to chartkick.js 1.1.0
Version bump
Updated readme
Better example
Added active_median
Use github link for groupdate
Use data for simpler examples
isPlainObject doesn't return true for functions
Merge pull request #32 from federomero/master

Dont return true on isPlainObject when passing a function
Better contributing section inspired by collectiveidea/audited
Updated chartkick.js - adds support for Google Charts localization - closes #47
Version bump
Merge tag 'v1.2.1'

Version 1.2.1

Conflicts:
	app/assets/javascripts/chartkick.js
	lib/chartkick/version.rb