Important: Reconsider option handling

[uliska]

Option handling is somewhat more complicated than usual:

• Package option
• Instance option
• "Design option" (= spacing parameter defaults for a given command)
  => instance options should be relative to the design option.

Maybe there's the need for a class here that transparently handles the options. The goal must be that the individual Formatter can be declared as simple as possible. Glyph formatters for example should be created simply with the command name and the glyph name, and optional design options.

In any case this has to be thought through before implementing the actual commands.