Copyright (c) 2003-2004 Tim-Philipp Müller
<tim at centricular dot net>
This tutorial may be redistributed and modified freely in any form, as long as all authors are given due credit for their work and all non-trivial changes by third parties are clearly marked as such either within the document (e.g. in a revision history), or at an external and publicly accessible place that is refered to in the document (e.g. a CVS repository).