Implement MIDI score splitter

[DolphinDTM]

Proposal to make this program even more useful that it already is, and for the sake of keeping every useful tool in a single program.

The MIDI score splitter would follow an algorithm that looks for each individual note start time. If two or more notes start at the exact same time, then you preserve the highest pitch note. Repeat this algorithm until there are no more simultaneous notes.

Note length is not a factor for the splitting algorithm, however note values must be preserved in the processed files, such as velocity, panning, etc.