all: Replacing deprecated NameComponents class with Name

NameComponents is kept for backwards compatibility as typedef to Name

refs #29
diff --git a/model/pit/ndn-pit-entry.h b/model/pit/ndn-pit-entry.h
index 9680ac2..694fd9f 100644
--- a/model/pit/ndn-pit-entry.h
+++ b/model/pit/ndn-pit-entry.h
@@ -137,7 +137,7 @@
   /**
    * @brief Get prefix of the PIT entry
    */
-  const NameComponents &
+  const Name &
   GetPrefix () const;
 
   /**