Updated Github API to V3.

Github API V2 has been removed.  The response data format also changed.

.themes/classic/source/javascripts/github.js

@@ -3,7 +3,7 @@ var github = (function(){
     var i = 0, fragment = '', t = $(target)[0];
 
     for(i = 0; i < repos.length; i++) {
-      fragment += '<li><a href="'+repos[i].url+'">'+repos[i].name+'</a><p>'+repos[i].description+'</p></li>';
+      fragment += '<li><a href="'+repos[i].html_url+'">'+repos[i].name+'</a><p>'+(repos[i].description||'')+'</p></li>';
     }
     t.innerHTML = fragment;
   }