allow for tickValues to be calculated dynamically via a function by providing the current domain
jshint fix
jshint fix
Fix disappearing tooltips with lots of segments.

This fixes an issue with tooltips disappearing when graphs are close to the top of the page and have lots of segments, causing them to be bigger than the chart height.
Merge pull request #473 from chriskalmar/dynamic-tickvalues

Dynamic tickValues
Merge pull request #475 from michalkop93/master

make area obey line.connect_null
Merge pull request #480 from jejansse/master

Fix disappearing tooltips with lots of segments.
Update c3.min.js
Release v0.2.5
Merge pull request #1 from masayuki0812/master

merging upstream