Include PUA for which data are available in appropriate format

[jsbien]

Cf. http://www.kreativekorp.com/charset/PUADATA/

Personally I'm interested only in MUFI, the "official" browser (https://skaldic.abdn.ac.uk/m.php?p=mufi) is obselete as it does not cover the version 4 of the recommendation.

[Boldewyn]

This is a bit of a wider scope than #123, but it’s not forgotten. The kreativekorp data is similar in structure to the Unicode data sets, but for the latter I use their XML files, so there is no synergy effect as of now that I could use to parse that info.