Fix invalid html definition

alchemy/static/css/style.css

@@ -52,7 +52,7 @@ a:hover {
   margin: 20px 0;
 }
 
-.header nav {
+.header ul {
   margin-bottom: 10px;
 }
 

alchemy/templates/base.html

@@ -69,7 +69,7 @@
           <p>{{ SITESUBTITLE }}</p>
           {% if LINKS or PAGES or FACEBOOK_URL or FEED_ALL_ATOM or GITHUB_URL or G_PLUS_URL or TWITTER_URL %}
           <hr>
-          <nav class="list-inline">
+          <ul class="list-inline">
             {% if LINKS %}
             {% for title, link in LINKS %}
             <li><a href="{{ link }}" target="_blank">{{ title }}</a></li>
@@ -101,7 +101,7 @@
             {% if TWITTER_URL %}
             <li><a class="fa fa-fw fa-twitter" href="{{ TWITTER_URL }}" target="_blank"></a></li>
             {% endif %}
-          </nav>
+          </ul>
           {% endif %}
         </div>
       </div>