Changes for version 0.12 - 2003-10-11
- manipulation of illegal ShiftJIS strings: SJIS_CALLBACK coderef are called with two parameters (like UNICODE_CODEREF).
- Reserved bytes (0x80, 0xA0, 0xFD..0xFF) are no longer a single-byte character.
- Internal tweak in XSUB: no longer relies on a string to be terminated with '\0'.
- added utf16_to_sjis0213() and utf32_to_sjis0213().
- but not yet sjis0213_to_utf16() and sjis0213_to_utf32()
- modified t04xncr.t avoiding a non-character.