First steps in CCNx packet coding. ccnx_encode* routines rewritten in NS3 style (using NS3::Buffer)

diff --git a/model/ccnx.cc b/model/ccnx.cc
index f54d1b0..7716366 100644
--- a/model/ccnx.cc
+++ b/model/ccnx.cc
@@ -1,4 +1,4 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
 /*
  * Copyright (c) 2007 INRIA
  *