Resolved Handlebars escaping issue with ampersands.

This: "&lt;&amp;&gt; <b>This is bold</b> &&&"
was being rendered as: "<&> <b>This is bold</b> &&&".

Matches fix made in handlebars proper, see
https://github.com/wycats/handlebars.js/commit/bd9a84a0b7
Merge pull request #900 from FernCreek/patch/fairbanksg/handlebars-escaping

Resolved Handlebars escaping issue with ampersands.