spruce up the README (I needed a change to force a new build number)

README.md

@@ -9,3 +9,9 @@ This source is available as open source; for details on licensing, see
 
 For information on how to use and contribute to this, see
 [the open source portal on the wiki](https://wiki.secondlife.com/wiki/Open_Source_Portal).
+
+To download the current default version, visit
+[the download page](https://secondlife.com/support/downloads). For
+even newer versions try
+[the Alternate Viewers page](https://wiki.secondlife.com/wiki/Linden_Lab_Official:Alternate_Viewers)
+