feat(docs): add a changelog link to the footer

Author: Di Peng

docs/src/templates/docs.css

@@ -80,10 +80,20 @@ li {
 #footer {
     clear: both;
     padding: 2em 4em 1em;
-    text-align: right;
     font-size: 12px;
 }
 
+#copyright {
+  float:right;
+  text-align: right;
+}
+
+#version {
+  margin-top: -1.2em;
+  margin-left: -2em;
+  margin-right: 0.5em;
+  color: #251BE0;
+}
 
 
 /*----- navigation styles -----*/

docs/src/templates/docs.js

@@ -5,6 +5,12 @@ function DocsController($location, $browser, $window) {
   var self = this;
   this.$location = $location;
 
+  self.versionNumber = angular.version.full;
+  self.version = angular.version.full + "  " + angular.version.codeName;
+  self.cookieName = "angularPref";
+  self.subpage = false;
+  self.offlineEnabled = (document.cookie.indexOf(self.cookieName) !== -1);
+
   if (!HAS_HASH.test($location.href)) {
     $location.hashPath = '!/api';
   }
@@ -67,7 +73,6 @@ function DocsController($location, $browser, $window) {
            "subject=" + escape("Feedback on " + $location.href) + "&" +
            "body=" + escape("Hi there,\n\nI read " + $location.href + " and wanted to ask ....");
   };
-
 }
 
 // prevent compilation of code

docs/src/templates/index.html

@@ -72,7 +72,13 @@ <h2 ng:bind="partialTitle"></h2>
       <ng:include id="content" src="getCurrentPartial()" onload="afterPartialLoaded()"></ng:include>
     </div>
 
-    <div id="footer">© 2010-2011 AngularJS</div>
+    <div id="footer">
+      <a id="version"
+         ng:href="https://github.com/angular/angular.js/blob/master/CHANGELOG.md#{{versionNumber}}"
+         ng:bind-template="v{{version}}">
+      </a>
+      <span id="copyright">© 2010-2011 AngularJS</span>
+    </div>
   </div>
 
   <script src="syntaxhighlighter/syntaxhighlighter-combined.js"></script>