feat(layout): add menu (#14)

_includes/menu.html

@@ -0,0 +1,11 @@
+<div class="row">
+    <div class="span8 offset2" style="margin-bottom: 1rem;">
+        <center>
+            <a href="/">Map</a> | 
+            <a href="/fork">Fork?</a> | 
+            <a href="/checklist">Checklist</a> |
+            <a href="/logo">Logo</a> | 
+            <a href="/translations">Translations</a>
+        </center>
+    </div>
+</div>

_layouts/default.html

@@ -5,6 +5,7 @@ layout: core
 <div id="wrap">
 	<div class="container">
 		{% include logo.html %}
+		{% include menu.html %}
 	</div>
 
 	{{ content }}