Update CHANGES and bump version

CHANGES

@@ -1,3 +1,10 @@
+3.4.1 (pre-release) 2016-12-13
+- Fix crash if user input an invaild server address. (#933)
+- Fix ERR_TOO_MANY_REDIRECTS with http proxy. (#937)
+- Show SS URL in QRCode form.
+- Add import URL from clipboard.
+- Bug fixes and improvements.
+
 3.4.0 (pre-release) 2016-12-9
 - Replace Privoxy with built-in http proxy.
 - Try fix system proxy settings on windows 10 insider preview.

shadowsocks-csharp/Controller/Service/UpdateChecker.cs

@@ -24,7 +24,7 @@ namespace Shadowsocks.Controller
         public string LatestVersionLocalName;
         public event EventHandler CheckUpdateCompleted;
 
-        public const string Version = "3.4.0";
+        public const string Version = "3.4.1";
 
         private class CheckUpdateTimer : System.Timers.Timer
         {