Copyright (c) 2005 Florian Cramer Media Design Research Piet Zwart Institute institute for postgraduate studies and research Willem de Kooning Academy Hogeschool Rotterdam Permission is granted to copy, distribute and/or modify this document under the terms of any of the following licenses - The GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. You should have received a copy of the GNU General Public License along with this document in the directory "licensing"; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA - The GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. You should have received a copy of the GNU Free Documentation License along with this document in the directory "licensing"; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA - The Creative Commons Attribution-ShareAlike License; either version 2.0 of the license or any later version. You should have received a copy of the Creative Commons Attribution-ShareAlike License along with this document in the directory "licensing"; if not, write to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.