ndn.cxx: Initial work to introduce full NDN application API to ndnSIM

Refs #1005 (http://redmine.named-data.net/)
diff --git a/examples/wscript b/examples/wscript
index c9850ae..437ed26 100644
--- a/examples/wscript
+++ b/examples/wscript
@@ -85,3 +85,9 @@
 
     obj = bld.create_ns3_program('ndn-simple-with-pit-count-stats', all_modules)
     obj.source = 'ndn-simple-with-pit-count-stats.cc'
+
+    obj = bld.create_ns3_program('ndn-simple-api', all_modules)
+    obj.source = [
+        'ndn-simple-api.cc',
+        'custom-apps/ndn-api-app.cc'
+        ]