Add facebook to footer

Closes #17

themes/tsc_vfl/assets/css/main.scss

@@ -272,6 +272,13 @@ h1 {
             font: 1em 'Open Sans Condensed', sans-serif;
         }
         
+        .facebook {
+            width: 20px;
+            height: 20px;
+            display: block;
+            background-image: url("img/facebook.jpg");
+        }
+
         .meta-menu {
             max-width: 70%;
             > ul {

themes/tsc_vfl/layouts/partials/page/footer.html

@@ -2,6 +2,7 @@
     <div class="first-entry">TSC im VfL Sindelfingen</div>
     <div class="last-entry meta-menu">
         <ul>
+            <li><a href="https://www.facebook.com/pages/Tanzsportclub-im-VfL-Sindelfingen/140842382700982" class="facebook"></a></li>
             <li><a href="{{ relref . "page/club/impressum" }}">Impressum & Datenschutz</a></li>
             <li><a href="{{ relref . "page/info/sitemap" }}">Sitemap</a></li>
             <li><a href="{{ relref . "page/info" }}">Kontakt</a></li>