Introducing a couple of real test cases.

Also, basic PIT test shows that everything works as expected...

There was one big change in PIT. Previously, when PIT entry was
satisfied, it was immediately removed. As of recently, PIT entry is
immediately removed.
diff --git a/model/ccnx-name-components.cc b/model/ccnx-name-components.cc
index 893f7bb..a79b6bb 100644
--- a/model/ccnx-name-components.cc
+++ b/model/ccnx-name-components.cc
@@ -43,7 +43,14 @@
       Add (component.get ());
     }
 }
-  
+
+CcnxNameComponents::CcnxNameComponents (const std::string &prefix)
+{
+  istringstream is (prefix);
+  is >> *this;
+}
+
+
 const std::list<std::string> &
 CcnxNameComponents::GetComponents () const
 {