Fix The Player 6.0A pattern depacking

When depacking The Player 6.0A patterns, don't repeat track events to
another track. Fixes spurious notes in p60.calm bottom4 (reported by
Andreas Falkenhahn <andreas@falkenhahn.com>).

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

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
The Player 5.0A code cleanup

Apply the same changes made to the P60A loader.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix Oktalyzer sample mapping

Oktalyzer load assumed a 1:1 mapping between instrument to sample mapping,
but this is not always the case when we have empty instruments. Fixes
replay of Locomotion.okt, reported by Andreas Falkenhahn
<andreas@falkenhahn.com>

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

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