The largest new feature is that it is now possible to include other
files into the RML by using the "include" tag. This is useful for making
markup files more modular.
Also added some more options for existing things (e.g. built-in detail
options).
This adds JSON as an additional scripting documentation output format.
This can be used by external tools to examine the scripting
documentation and generate interface declarations or documentation for
any language. The existing documentation code is left largely in place.