Readable UTF-8 characters in JSON results

[DaBaDa79]

When parsing JSON documents containing UTF-8 characters (like diacritic letters as é or the German umlauts Ä, Ö, Ü, ä, ö, ü, ß) these are emitted via SIO unmodified. End user programs could profit if the FujiNet converts all these chars to the corresponding - as available - equivalents of the destination platform (i.e. the "International Character Set" on ATARI)