cmaurer/angularjs-nvd3-directives — pull request #21 by robschley (2013-09-27 15:22:06+00:00)
Title: Added support for the new useInteractiveGuideline feature (if it is available). 

I wrapped it in a conditional check to see if the method is available in the chart so that it doesn't break for people who might be using a slightly older version of nvd3.