Release preparations for 2.1.6

Version bump and CHANGELOG update

src/CHANGELOG

+2.1.6
+ * Bug 22538+22513: Fix new circuit button for error pages
+ * Bug 29825: Intelligently add new Security Level button to taskbar
+ * Bug 29903: No WebGL click-to-play on the standard security level
+ * Bug 27484: Improve navigation within onboarding (strings)
+ * Bug 29768: Introduce new features to users (strings)
+ * Bug 29943: Use locales in AB-CD scheme to match Mozilla
+ * Bug 26498: Add locale: es-AR
+ * Bug 29973: Remove remaining stopOpenSecuritySettingsObserver() pieces
+ * Translations update
+
 2.1.5
  * Bug 25658: Replace security slider with security level UI
  * Bug 28628: Change onboarding Security panel to open new Security Level panel

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>2.1.5</em:version>
+        <em:version>2.1.6</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>