documentcloud/underscore — pull request #536 by pwmckenna (2012-03-31 17:30:44+00:00)
Title: Update underscore.js

There are occasionally cases where there is no event to bind to when waiting for a condition to be true. This was initially used as an easy way to wait for an external resource to be available (for instance if you're waiting for a mime type to be supported due to a plugin installation)