handlebar helpers

index.html

@@ -52,6 +52,7 @@
 
       <ul>
         <li>References</li>
+        <li><a href="https://github.com/assemble/handlebars-helpers#helpers">handlebar helpers</a></li>
         <li><a href="https://github.com/bbatsov/rubocop/blob/master/config/default.yml">rubocop yml</a></li>
         <li><a href="http://danwin.com/2013/03/ruby-minitest-cheat-sheet/">minitest cheatsheet</a></li>
         <li><a href="http://www.mattsears.com/articles/2011/12/10/minitest-quick-reference/">minitest (mattsears)</a></li>