Change in CcnxApp API.  Now callbacks also contain pointer of original
packet (useful to get packet tags, if they exist)

Reflecting changes in PackegTag API

Rescanning bindings

More work on packet-path-weight tracers
diff --git a/wscript b/wscript
index d4b9bc9..68b1f63 100644
--- a/wscript
+++ b/wscript
@@ -62,6 +62,7 @@
         "helper/tracers/ccnx-app-tracer.h",
         "helper/tracers/ccnx-l3-tracer.h",
         "helper/tracers/ccnx-consumer-window-tracer.h",
+        "helper/tracers/ccnx-path-weight-tracer.h",
         "helper/ccnx-face-container.h",
 
         "apps/ccnx-app.h",
@@ -73,6 +74,7 @@
         "model/ccnx-interest-header.h",
         "model/ccnx-content-object-header.h",
         "model/ccnx-name-components.h",
+        "model/ccnx-path-stretch-tag.h",
         "model/ccnx-fib.h",
 
         "utils/spring-mobility-model.h",