Update news

Author: kpeeters

web2/cadabra2/source/index.html

@@ -20,6 +20,12 @@ <h1>News</h1>
   if you want to be a beta tester.
 </p>
 <dl>
+  <dt>11 November 2019</dt>
+  <dd>New Windows installer. Thanks to feedback from many users, there
+  is now a new Windows installer which hopefully takes care of many of
+  the installation problems encountered with earlier versions. 
+  <a href="/packages/windows/">Download the windows installer (2.2.7)</a>.
+  </dd>
   <dt>18 April 2019</dt>
   <dd>Release of 2.2.6
   (<a href="changelog.html#2.2.6">changes</a>). Many features for