Update changelog and jupyter page.

Author: kpeeters

web2/cadabra2/source/changelog.html

@@ -24,7 +24,9 @@ <h3>github master (2.3.3)</h3>
     to new symbols.</li>
   <li>Fix bug pulling with <tt>@(...)</tt> operator.</li>
   <li>Add option <tt>redundant</tt> to <tt>eliminate_metric</tt> to
-  only eliminate metrics which have two dummy indices (David).</li>
+    only eliminate metrics which have two dummy indices (David).</li>
+  <li>Added option to export notebooks to Jupyter, and a command-line
+    utility to do the same.</li>
 </ul>
 
 <a name="2.3.2"></a>

web2/cadabra2/source/jupyter.html

@@ -67,8 +67,9 @@ <h2>Differences with Cadabra's own notebook</h2>
   that Jupyter notebooks (with extension <tt>.ipynb</tt>) and Cadabra
   notebooks (with extension <tt>.cnb</tt>) are not the same file
   format. You can read notebooks created in Jupyter into the Cadabra
-  <tt>cadabra2-gtk</tt> client, but you cannot read Cadabra notebooks
-  into Jupyter (at least not until a converter is written).
+  <tt>cadabra2-gtk</tt> client, and you can (as of version 2.3.3)
+  export Cadabra notebooks as Jupyter notebooks, but it is good to
+  keep this in mind.
 </p>
 <p class="hyphenate">
   You <em>can</em>, however, make use of Cadabra packages inside the