Python scripts

These are located in the scripts subdirectory, which needs to be added to the program search path.

They should work with both Python 2 and Python 3.

Script	Function
`bom.py`	Generates BOM files for the project.
`c14n_stl.py`	OpenSCAD produces randomly ordered STL files. This script re-orders them consistently so that GIT can tell if they have changed or not.
`doc_scripts.py`	Makes this document and doc/usage.md.
`dxfs.py`	Generates DXF files for all the routed parts listed on the BOM or a specified list.
`gallery.py`	Finds projects and adds them to the gallery.
`make_all.py`	Generates all the files for a project by running `bom.py`, `stls.py`, `dxfs.py`, `render.py` and `views.py`.
`render.py`	Renders STL and DXF files to PNG for inclusion in the build instructions.
`set_config.py`	Sets the target configuration for multi-target projects that have variable configurations.
`stls.py`	Generates STL files for all the printed parts listed on the BOM or a specified list.
`svgs.py`	Generates SVG files for all the routed parts listed on the BOM or a specified list.
`tests.py`	Runs all the tests in the tests directory and makes the readme file with a catalog of the results.
`views.py`	Generates exploded and unexploded assembly views and scrapes build instructions to make readme.md, readme.html and printme.html files for the project.