* This is the evolution of a simple derivative of Mendel/Huxley.
 * It was originally inspired by Vik's efforts and more recently Prusa Mendel.
 * Some more general discussion is found at RepRapBreeding
 * The core files for the my development of an Integrated Parametric RepRap in OpenSCAD are:
 * IPR_DNA: All constants and calculations, the constants define all the possible things that make a specific robot unique. (ranging from desired build space to fastener and bearing sizes)
 * IPR_func: All "standard" modules, such as motor mounts, bearing mounts, hardware models, etc... currently this file "builds" the main frame out of the hardware specified in the IPR_DNA file.
 * IPR_parts: All the actual part modules.  
 *
 *  By Nicholas C Lewis 2010
 *
 *  http://www.thingiverse.com/thing:4784
 *  http://www.thingiverse.com/thing:4960
 *  http://www.thingiverse.com/thing:5048
 *  http://reprap.org/wiki/Integrated_Parametric_RepRap
 *
 *  Loosly based on "mendel_misc.inc" by Vik Olliver 29-03-2010.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA