Prepare release 0.5.1

Change-Id: I96ce5a15fe653cc59650edec2a9e42c2253f99a1
diff --git a/wscript b/wscript
index 173563b..3030b8f 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 = "0.5.0"
+VERSION = "0.5.1"
 APPNAME = "nlsr"
 BUGREPORT = "https://redmine.named-data.net/projects/nlsr"
 URL = "https://named-data.net/doc/NLSR/"