update release notes

doc/index.html

@@ -351,7 +351,7 @@ AR=$(CROSS)ar</pre>
 
     <dl>
 
-    <dt>2009-xx-xx &ndash; Release 2.7</dt>
+    <dt>2009-08-11 &ndash; Release 2.7</dt>
     <dd>
         <p>
         <a href="http://www.profv.de/mingw_cross_env/mingw_cross_env-2.7.tar.gz">Download</a> |
@@ -359,11 +359,17 @@ AR=$(CROSS)ar</pre>
         </p>
 
         <p>
-        This release ...
+        This release
+        provides an improved version recognition
+        for SourceForge packages.
+        SourceForge changed their page layout
+        in a way that makes it much harder
+        to identify the current version of a package.
         </p>
 
         <p>
-        Almost all packages are updated to their latest version.
+        Additionally,
+        almost all packages are updated to their latest version.
         </p>
     </dd>