Added search capabilities

_layouts/category.html

@@ -6,7 +6,7 @@ layout: default
     <h1>{{page.title}}</h1>
     <ol>
     {% for article in site.articles %}
-    {% if article.category == page.category %}
+    {% if article.category == page.title %}
         <li><a href="{{article.url}}">{{article.title}}</a></li>
     {% endif %}
     {% endfor %}