Change the Doxyfile project name from KiCAD to KiCad. It doesn't look
very good when we don't get the project name capitalization correct.
Clean up trailing whitespace in some of the helper scripts and Doxyfile.
pcbnew.py + doxygen-xml files, and build .i files with docstrings,
those .i files are included back again to build a pcbnew.py with
extended documentation from C++, finally we take the final pcbnew.py
to build the doxygen-python documentation