Prepare release 0.6.2

Change-Id: Ib3810a4383ce24b473464f63c435251466a256dc
diff --git a/wscript b/wscript
index b47b0ed..2879df5 100644
--- a/wscript
+++ b/wscript
@@ -1,6 +1,6 @@
 # -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
-VERSION = '0.6.1'
+VERSION = '0.6.2'
 APPNAME = 'ndn-tools'
 GIT_TAG_PREFIX = 'ndn-tools-'