Prepare release 0.5

Change-Id: I196869398c577fb0f1c702218a22bc90dd0d3716
Refs: #4275
diff --git a/wscript b/wscript
index abdf4ef..e4991b3 100644
--- a/wscript
+++ b/wscript
@@ -1,6 +1,6 @@
 # -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
-VERSION = '0.4'
+VERSION = '0.5'
 APPNAME = 'ndn-tools'
 GIT_TAG_PREFIX = 'ndn-tools-'