Add libraries to KiCad.

I added the code to download and install the component, legacy footprint, and 3D model libraries in the KiCad package.  I also made a minor change to the way the documentation is installed in the package.  Rather than have a separate build  for 32 and 64 packages, only the install path is changed preventing the same source from being copied twice.  I also applied this to the library install as well.  This will now yield a full KiCad install.  I should warn you that the packages are greater than 110M.