Prepare release 0.5.0

Change-Id: I8ebb2f5779d7da0c0b6c2f11cc9c653e8d3b1d90
diff --git a/wscript b/wscript
index 52c9882..173563b 100644
--- a/wscript
+++ b/wscript
@@ -19,7 +19,7 @@
 NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 """
 
-VERSION = "0.4.3"
+VERSION = "0.5.0"
 APPNAME = "nlsr"
 BUGREPORT = "https://redmine.named-data.net/projects/nlsr"
 URL = "https://named-data.net/doc/NLSR/"