Prepare release 0.7.0

Change-Id: Id6bba5f9b83c3f317f5ee81b170bc5ce50806a29
Refs: #5045
diff --git a/wscript b/wscript
index d04c8bc..b1b0129 100644
--- a/wscript
+++ b/wscript
@@ -3,7 +3,7 @@
 from waflib import Context, Logs, Utils
 import os, subprocess
 
-VERSION = '0.6.6'
+VERSION = '0.7.0'
 APPNAME = 'ndn-cxx'
 PACKAGE_BUGREPORT = 'https://redmine.named-data.net/projects/ndn-cxx'
 PACKAGE_URL = 'http://named-data.net/doc/ndn-cxx/'