Build requirements:

  1. The "base64" utility from GNU coreutils.
  2. The "scour" SVG optimizer.
  3. The "fontforge" program.
  4. The "xsltproc" program from libxslt.

SVG Tricks:

1. To remove a "transform" from a group (like the bus) that was
   resized together, simply ungroup and regroup the whole thing.