Thanks to the following websites for providing tutorials which have helped me
to learn SDL:
http://www.parallelrealities.com
http://www.sdltutorials.com

Thanks also to the maintainers of the SDL Documentation, and man pages, and
especially the GNU libc man pages and manual, all of which are invaluable
references.

Thanks also to the Linux Game Tomb for their resources:
http://www.happypenguin.org

And thanks to those on netbehaviour.org mailing list who've encouraged me :-)
