Add Hamlib Group to Copyright line.

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@2222 7ae35d74-ebe9-4afe-98af-79ac388436b8

README.developer

@@ -1,5 +1,6 @@
 Hamlib - (C) Frank Singleton 2000 (vk3fcs@ix.netcom.com)
-	and Stephane Fillod 2000-2006
+	 (C) Stephane Fillod 2000-2007
+         (C) The Hamlib Group 2000-2007
 
 Take a look at http://sourceforge.net/projects/hamlib/
 Here you will find a mail list, and the latest CVS releases.