Railroad diagram generator improvements

The following should be improved:

• Add manual for the debugging output.
• Generate up-to-date new railroad diagrams for the railroad diagram documentation itself.
• Update documentation for changes to the railroad diagram generator, including different type of configuration values, etc.
• Production use still has its own (breaking) graphics settings.
• Given the problems with awt, it shouldn't be used for graphics. A better approach is a computation for arc pixels, horizontal/vertical lines, etc. The computation needs an instance, while PaintSupport is currently a static class. So at that spot some shifting needs to be done. A first look suggested the ImageOutput base class. This simplifies awt to BufferedImage, saving, and plotting text.
• Text size problem, see #110 (closed).

These were taken from !252 (comment 441029) and !252 (comment 456591).