Update changelog for 0.20.1.

debian/changelog

+tails (0.20.1) unstable; urgency=low
+
+  * Major new features
+  - Install Linux kernel 3.10-2 from sid.
+
+  * Bugfixes
+  - Remount persistence devices read-only at shutdown/reboot time
+    (Closes: #6228).
+  - Greeter: display a warning icon on admin password mismatch and on
+    persistence unlocking failure. Thanks to Andres Gomez Ramirez
+    <andres.gomez@cern.ch> for the fix!
+  - Don't torsocksify Pidgin.
+    Instead we disable Pidgin's GNOME integration to get the "Global proxy
+    configuration", which we set to use Tor. This fixes the I2P IRC account.
+  - Additional software: fix typo in notification.
+  - Allow installing "Priority: standard" packages that we do not install
+    by default: remove them late in the build process instead of assigning
+    them a -1 APT pinning level.
+
+  * Minor improvements
+  - Update AdBlock Plus patterns.
+  - Use more unique ISO file name when building from Jenkins.
+  - Additional software: point to the system log on upgrade failure.
+
+  * Localization
+  - Import new translations from Transifex.
+
+  * Test suite
+  - Fix old ISO checking for consistent error reporting.
+  - Remove custom persistence test from manual test suite.
+    It was removed for the GUI in t-p-s 0.33.
+
+ -- Tails developers <tails@boum.org>  Mon, 09 Sep 2013 12:42:50 +0200
+
 tails (0.20) unstable; urgency=low
 
   * Major new features