page layout will now accept pages without title metadata

.themes/classic/source/_layouts/page.html

@@ -4,10 +4,12 @@ layout: default
 
 <div>
 <article>
+  {% if page.title %}
   <header>
     <h1 class="entry-title">{{ page.title | titlecase }}</h1>
     {% if page.date %}<p class="meta">{% include post/date.html %}</p>{% endif %}
   </header>
+  {% endif %}
   {{ content }}
   {% unless page.footer == false %}
     <footer>