Class: XMTextBufferWindow

(Direct child class of XMTextWindow)

The XMTextBufferWindow is just a XMTextWindow
with a scrollback buffer. So there's no new
functionality, just some functions behave different,
but just as you would expect it from a usual
telnet widget.

Example:
	$win = new XMTextBufferWindow(); # it's still hidden
	$win->move(0, 0);
	$win->resizeChars(30, 10);
	$win->show();
	$win->setCursor(14, 9);

	# this statement will cause the window to scroll
	# down one line automagically. A scrollbar will
	# appear at the widget's right side...
	$win->print("Some nice heading\n");
	
	# the next statement will cause the window
	# to scroll to the beginning of the buffer.
	# Unlinke XMTextWindow no new lines are
	# inserted. You can only scroll within the
	# filled area.
	$win->scrollLines(-42);