Proposed document structure and content for IDNA

[Shawn Steele]

+1, however rationale shouldn't block the others...


> Then we could have three docs:

>  - protocol* (incorporates bidi.txt, normative part of tables.txt,
>  normative part of rationale.txt)
>  - tables* ( the long lists from tables.txt, the context rules, exception
>  lists: all to go onto IANA and be updated there with successive versions of
>  Unicode and any the Expert Reviewer Committee's changes)
>  - rationale* (the non-normative part of rationale, however much we want
>  there)