Updated format (removed tabs) and added missing copyrights

[SVN r17214]

tutorial/helloworld4.cpp

@@ -1,3 +1,14 @@
+// Copyright (C) 2001-2003
+// William E. Kempf
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation.  William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+
 #include <boost/thread/thread.hpp>
 #include <boost/bind.hpp>
 #include <iostream>
@@ -11,4 +22,4 @@ int main()
 {
     boost::thread thrd(boost::bind(&helloworld, "Bob"));
     thrd.join();
-}
+}