Tunefish

When using no ADSR, instruments were cut immediatelly resulting in plopping. This is fixed.
ADSR zero decay will no longer cause volume go up and cause things like reverb crashes or host going to mute.
Saving an instrument caused the preset file to grow larger and larger due to appending instead of rewriting the contents.
Restore instrument button did not work.
Instrument count is now 1000.
ADSR1 will not cut the note if ADSR2 is still going.
Fixed Reverb width.