Remove relative links for markdown plugin

This plugin caused the Github site builder to kill the build (github has
a limited number of trusted plugins - this wasn't one of them).

Author: felixmulder

docs/_config.yml

@@ -1,6 +1,5 @@
 title: Dotty Documentation
 baseurl: "/"
-markdown: JekyllMarkdownLinkConverter
 theme: minima
 gems:
     - jekyll-toc

docs/_layouts/default.html

@@ -19,5 +19,13 @@
         </div>
     </body>
     <script src="/js/highlight.pack.js"></script>
-    <script>hljs.initHighlightingOnLoad();</script>
+    <script language="javascript">
+        hljs.initHighlightingOnLoad();
+        var x = document.links.length;
+        for (i = 0; i < x; i++) {
+            var thisHREF = document.links[i].href;
+            if (thisHREF.indexOf(window.location.hostname) > -1) thisHREF = thisHREF.replace(".md","/").replace("/index/","/");
+            document.links[i].setAttribute('href', thisHREF);
+        }
+    </script>
 </html>