Add search feature using grep.

templates/search.html

@@ -0,0 +1,21 @@
+{% extends "base.html" %}
+
+{% block styles %}
+    {{ super() }}
+    <link rel="StyleSheet" href="/search.css" type="text/css" media="screen" />
+{% endblock styles %}
+
+{% block content %}
+
+<ul id="results">
+{% for result in results %}
+<li>
+    <h2><a href="{{ relative_root | safe }}{{ result.page.url }}">{{ result.page.full_name }}</a></h2>
+    {% for line in result.matches %}
+    <p>{{ line | safe }}</p>
+    {% endfor %}
+</li>
+{% endfor %}
+</ul>
+
+{% endblock content %}