docs+build: Prepare for version 0.5.0 release

Change-Id: I0f7fbd26d6d3f22c1d14ff10b53c1276abe0aa0c
Refs: #3762
diff --git a/wscript b/wscript
index b029c75..767e18c 100644
--- a/wscript
+++ b/wscript
@@ -24,7 +24,7 @@
 NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 """
 
-VERSION = "0.4.1"
+VERSION = "0.5.0"
 APPNAME = "nfd"
 BUGREPORT = "http://redmine.named-data.net/projects/nfd"
 URL = "http://named-data.net/doc/NFD/"