shorten the names displayed in doc

docs/_static/build_toc.js

@@ -5,7 +5,7 @@ $(function (){
   var createList = function(selected) {
     var ul = $('<ul>');
 
-    selected.each(function(i,e) {
+    selected.each(function(_, e) {
       var fullname = e.id;
       if (fullname.startsWith('tensorpack.'))
         fullname = fullname.substr(11);

docs/_static/sanitize_desc_name.js

+//File: sanitize_desc_name.js
+
+$(function (){
+  var selected = $('div.section>dl>dt>code.descclassname');
+  selected.each(function(_, e) {
+    var text = e.innerText;
+    if (text.startsWith('tensorpack.')) {
+      text = text.substr(11);
+      e.innerText = text;
+    }
+  });
+});

docs/_templates/layout.html

@@ -4,6 +4,10 @@
     <script type="text/javascript"
 						src={{ pathto('_static/jquery-3.2.1.min.js', 1) }}>
 		</script>
+    <script type="text/javascript"
+						src={{ pathto('_static/sanitize_desc_name.js', 1) }}>
+		</script>
+
 		<script>
   (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
   (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),