Make header more consistent in reference docs
-## <a name="helpers" id="helpers" data-magellan-target="helpers" class="anchor">Handlebars Helpers</a>
+# <a name="helpers" id="helpers" data-magellan-target="helpers" class="anchor">Handlebars Helpers</a>
Habitat not only allows you to use [Handlebars-based](http://handlebarsjs.com) tunables in your plan, but you can also use both built-in Handlebars helpers as well as Habitat-specific helpers to define your configuration logic.
