More progress on CCNx stack. Now we have helpers. Everything compiles, but not yet working

diff --git a/model/ccnx-interest-header.h b/model/ccnx-interest-header.h
index 4b505ea..259e156 100644
--- a/model/ccnx-interest-header.h
+++ b/model/ccnx-interest-header.h
@@ -132,7 +132,7 @@
    *
    * Creates a null header
    **/
-  InterestHeader ();
+  CcnxInterestHeader ();
 
   /**
    * \brief Set interest name