Add Techvision's accessibility review to History

Author: drbrain

History.rdoc

@@ -1,5 +1,15 @@
 === 4.1.0.preview.3 / 2012-12-02
 
+* Notable changes
+  * Improved accessibility of HTML output.  Accessibility review was provided
+    by:
+
+    Techvision – http://www.techvision.net.in
+
+    The accessibility consultants in Pune, India
+
+  * The look of RDoc has been updated.
+
 * Minor enhancements
   * RDoc can now link to [], []=, << and >> methods.  Pull request #202 by
     Jeremy Evans, Bug # 191 by by Zachary Scott.