mustache/vim-mustache-handlebars — pull request #22 by maufl (2014-06-14 16:17:19+00:00)
Title: Add *.hdbs extension to ftdetect

Zendesk Apps require handlebar templates to end in .hdbs.
This change adds detection of handlebar templates with this extension.
http://developer.zendesk.com/documentation/apps/templates.html