Add patch modifier maps similar to drum mapper

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Issue #26 new
James Alan Nguyen repo owner created an issue

It turns out, for banks such as CTMIDI and SAPI!, there appears to be a need for things such as transpose, detune, pan locks and perhaps maybe potentially even retrigger periods. Without altering the patch bank structure (for now), like with the drum bank note/key maps, have something for each patch to assign specific properties.