simplify YAML params and readme

_layouts/page.html

@@ -8,9 +8,9 @@ layout: default
     <div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1">
 	  <div class="page-heading">
 	    <h1>{{ page.title }}</h1>
-	    {% if page.description %}
+	    {% if page.subtitle %}
 	    <hr class="small">
-	    <span class="page-subheading">{{ page.description }}</span>
+	    <span class="page-subheading">{{ page.subtitle }}</span>
 	    {% endif %}
 	  </div>
     </div>