docs+build: Prepare release for version 0.3.1

Change-Id: I01d0b8e71ee4fdf37957a323e11e87f69672d473
diff --git a/wscript b/wscript
index eeb5524..dbdb5a6 100644
--- a/wscript
+++ b/wscript
@@ -20,7 +20,7 @@
 NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 """
 
-VERSION = '0.3.0'
+VERSION = '0.3.1'
 APPNAME = "nlsr"
 BUGREPORT = "http://redmine.named-data.net/projects/nlsr"
 URL = "http://named-data.net/doc/NLSR/"