Revision 101

Changed package name  for error handlers to Global:: (from main::) to match
the change which occured in Global.pm version 1.6 where the handlers were moved
inside the Global.pm package.
	 $SIG{'FPE'}  = \&Global::PG_floating_point_exception_handler;
	 $SIG{__WARN__}=\&Global::PG_warnings_handler;

Warning messages from within problems and from within macros should now work again.