changes: Add 'Changes' section to track changes since previous versions of the spec

This commit also includes updated HTML CSS.

Change-Id: I0f45e3fba25587f97cbb63332d457baacb515f40
diff --git a/named_data_theme/layout.html b/named_data_theme/layout.html
index a9fe3ba..65681b8 100644
--- a/named_data_theme/layout.html
+++ b/named_data_theme/layout.html
@@ -7,9 +7,9 @@
 {% block header %}
     <!--headercontainer-->
     <div id="header_container">
-    
+
         <!--header-->
-        <div class="row">    
+        <div class="row">
              <div class="three columns">
                   <div id="logo">
                         <a href="http://named-data.net" title="A Future Internet Architecture"><img src="http://named-data.net/wp-content/uploads/cropped-20130722_Logo2.png" alt="" /></a>
@@ -21,7 +21,7 @@
                <h1><a href="{{ pathto(master_doc) }}">{{ shorttitle|e }}</a></h1>
              </div>
         </div>
-    </div><!--header container end-->    
+    </div><!--header container end-->
 
 {% endblock %}
 
@@ -38,6 +38,7 @@
           <h3>{{ _('Table Of Contents') }}</h3>
           {{ toctree() }}
           {%- endblock %}
+
           {%- block sidebarsearch %}
           <h3 style="margin-top: 1.5em;">{{ _('Search') }}</h3>
           <form class="search" action="{{ pathto('search') }}" method="get">
@@ -62,28 +63,17 @@
         <div class="row">
         </div><!-- footer container-->
     </div>
-    
+
     <div id="footer-info">
         <!--footer container-->
         <div class="row">
-            <div class="twelve columns">                    
+            <div class="twelve columns">
 
                 <div id="copyright">This research is partially supported by NSF (Award <a href="http://www.nsf.gov/awardsearch/showAward?AWD_ID=1040868" target="_blank>">CNS-1040868</a>)<br/><br/><a rel="license" href="http://creativecommons.org/licenses/by/3.0/deed.en_US" target="_blank">Creative Commons Attribution 3.0 Unported License</a> except where noted.</div>
-                    
-            </div>    
-        </div>        
+
+            </div>
+        </div>
     </div><!--footer info end-->
-    
-    <script type="text/javascript">
-    var _gaq = _gaq || [];
-    _gaq.push(['_setAccount', 'UA-22320603-1']);
-    _gaq.push(['_trackPageview']);
-    (function() {
-    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
-    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
-    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
-    })();
-    </script>
 {% endblock %}
 
 {% block relbar1 %}{% endblock %}