add theme credits

_layouts/default.html

@@ -19,5 +19,13 @@
 
     {{ content }}
 
+    {% unless site.show_credits == "false" %}
+      <aside class="site-credits">
+        <p>
+          <small><a href="https://github.com/patdryburgh/hitchens">Hitchens Theme</a> powered by <a href="http://jekyllrb.com">Jekyll</a></small>
+        </p>
+      </aside>
+    {% endunless %}
+
   </body>
 </html>

_sass/_base.scss

@@ -54,6 +54,10 @@ blockquote.epigraph {
   font-style: italic;
 }
 
+small {
+  font-size: .75em;
+}
+
 p > cite {
   display: block;
   text-align: right;
@@ -122,4 +126,10 @@ hr {
   .post-link & {
     padding: .5em 0;
   }
+}
+
+.site-credits {
+  margin: 2em auto;
+  padding: 0 2em;
+  text-align: center;
 }