Correcting python bindings (+ rescan)

Removing obsolete and unnecessary code
diff --git a/model/ccnx-name-components.cc b/model/ccnx-name-components.cc
index a7066de..323a3f8 100644
--- a/model/ccnx-name-components.cc
+++ b/model/ccnx-name-components.cc
@@ -77,6 +77,7 @@
     {
       os << "/" << *i;
     }
+  if (m_prefix.size ()==0) os << "/";
 }
   
 std::ostream &