Release preparations for 2.0.13

Skip 2.0.12 as the version number in the CHANGELOG file was wrong.

src/CHANGELOG

-2.0.11
+2.0.13
  * Bug 30388: Make sure the updated intermediate certificate is working
 
 2.0.11

src/install.rdf

@@ -6,7 +6,7 @@
         <em:name>Torbutton</em:name>
         <em:creator>Mike Perry</em:creator>
         <em:id>torbutton@torproject.org</em:id>
-        <em:version>2.0.12</em:version>
+        <em:version>2.0.13</em:version>
         <em:multiprocessCompatible>true</em:multiprocessCompatible>
         <em:homepageURL>https://www.torproject.org/projects/torbrowser.html.en</em:homepageURL>
         <em:iconURL>chrome://torbutton/skin/tor.png</em:iconURL>