sensu/sensu — pull request #798 by portertech (2014-09-29 21:12:55+00:00)
Title: Check "source" attribute validation

![tumblr_n6wggo6ioe1shxaddo1_500](https://cloud.githubusercontent.com/assets/149630/4449589/5ee719aa-481d-11e4-8192-8d8bafb0f1e1.gif)