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UTAU voicebank converter for Linux 0.75.2f

Added more characters.
Fixed a bug that turns "tsu" into "tsa" upon doing additional conversions.
An updated version with a great improvement: converts VCVs without problems!
It still has to be ran more than once to convert a VB fully.
Other updates and bugfixes:
- changed breath character;
- added special characters found in Teto's VB;
- added additional shell script to generate si and zi sounds.