build: various updates

 * Upgrade waf to 2.0.14
 * Sync default compiler flags with ndn-cxx
 * Simplify compilation of unit-tests

Change-Id: I36508fc7d679a951342a3abfeb0c8cb18dbfda51
diff --git a/README.md b/README.md
index cabc9db..99cd7af 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
-NAC: Named-Based Access Control
-===============================
+# NAC: Named-Based Access Control
+
+[![Build Status](https://travis-ci.org/named-data/name-based-access-control.svg?branch=new)](https://travis-ci.org/named-data/name-based-access-control)
 
 Please submit any bugs or issues to the NAC issue tracker:
-http://redmine.named-data.net/projects/nac/issues
+https://redmine.named-data.net/projects/nac/issues