Changes and release notes updated

CHANGES.html

@@ -51,6 +51,9 @@ us a note on ns-developers mailing list.  </p>
 <h2>New API:</h2>
 
 <ul>
+<li><b>Matrix propagation loss model:</b> This radio propagation model uses a two-dimensional matrix
+of pathloss indexed by source and destination nodes.
+
 <li><b>WiMAX net device</b>: The developed WiMAX model attempts to provide an accurate MAC and
 PHY level implementation of the 802.16 specification with the Point-to-Multipoint (PMP) mode and the WirelessMAN-OFDM 
 PHY layer. By adding WimaxNetDevice objects to ns-3 nodes, one can create models of

RELEASE_NOTES

@@ -39,7 +39,9 @@ New user-visible features
   b) Distributed simulation for point-to-point networks using the Message 
      Passing Interface (MPI) standard.
     
-  c) 
+  c) Matrix propagation loss model uses a two-dimensional matrix of pathloss indexed 
+     by source and destination nodes.
+
 
 API changes from ns-3.7
 -----------------------