Integrated Parametric RepRap Pre-Release 2

This is a second pre-release of the core files for the my development of an Integrated Parametric RepRap in OpenSCAD. These files contain the following:
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