gruntjs/grunt-contrib-handlebars — pull request #50 by CMTegner (2013-05-21 14:18:16+00:00)
Title: Adding support for 'known helpers' (`knownHelpers` & `knownHelpersOnly`)

Adding support for the two compiler options relating to 'known helpers':
* `knownHelpers`
* `knownHelpersOnly`