Repair bug in ccnb parsing.  First steps in adding correct documentation tags

diff --git a/model/ccnx-face.cc b/model/ccnx-face.cc
index 15ddb84..6ce6b92 100644
--- a/model/ccnx-face.cc
+++ b/model/ccnx-face.cc
@@ -151,7 +151,7 @@
     }
 
   m_device->Send (packet, m_device->GetBroadcast (), 
-                  CcnxL3Protocol::PROT_NUMBER);
+                  CcnxL3Protocol::ETHERNET_FRAME_TYPE);
 }
 
 std::ostream& operator<< (std::ostream& os, CcnxFace const& face)