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.h b/model/ccnx-name-components.h
index 1d8ef2a..eb4f8c1 100644
--- a/model/ccnx-name-components.h
+++ b/model/ccnx-name-components.h
@@ -63,6 +63,13 @@
   CcnxNameComponents (const std::list<boost::reference_wrapper<const std::string> > &components);
 
   /**
+   * @brief Constructor
+   * Creates a prefix from the string (string is parsed using operator>>)
+   * @param[in] prefix A string representation of a prefix
+   */
+  CcnxNameComponents (const std::string &prefix);
+  
+  /**
    * \brief Generic Add method
    * Appends object of type T to the list of components 
    * @param[in] value The object to be appended