Update version number

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Remap MMD2 note events

To keep event numbering mostly consistent across different MMD versions,
remap MMD2 note events two octaves above and prevent falling into invalid
octave numbers. This allows us to keep the lower notes in MMD2 without
breaking support for MMD0/MMD1/MMD3, including IFFOCT instruments (or so
I hope). The side effect is that the lowest octave in MMD3 won't be played.

We can't have a perfect mapping for all MMDs because the combined range
is wider than the libxmp range. Let's hope that nobody notices.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>