Update Soundtracker 2.6 file format description

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Rename variable used to hold ST2.6 speed

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Use standard finetune setting in ST2.6 loader

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Reindent ST2.6 loader

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update license text in module loader files

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Ignore finetune value in ST2.6 loader

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