updated release notes

CHANGES.html

@@ -52,6 +52,14 @@ us a note on ns-developers mailing list.  </p>
 
 <h2>New API:</h2>
 <ul>
+<li><b>Athstats</b>
+<p>New classes AthstatsWifiTraceSink and AthstatsHelper.
+</p>
+</li>
+<li><b>WifiRemoteStationManager </b>
+<p>New trace sources exported by WifiRemoteStationManager: MacTxRtsFailed, MacTxDataFailed, MacTxFinalRtsFailed and MacTxFinalDataFailed.
+</p>
+</li>
 <li><b> IPv6 additions</b>
 <p> Add an IPv6 protocol and ICMPv6 capability.
 <ul>

RELEASE_NOTES

@@ -45,6 +45,10 @@ New user-visible features
     - Radvd application (send RA);
     - Examples (ping6, simple-routing-ping6, radvd, radvd-two-prefix,
       icmpv6-redirect).
+
+  c) added AthstatsHelper, which enables the wifi device to produce
+     periodic reports similar to the ones generated by madwifi's
+     athstats tool (Nicola Baldo)
  
  
 API changes from ns-3.5