Add Sixteen Hole Chromatic

[FTWynn]

Based off the Standard Chromatic set

[FTWynn]

Actually... This doesn't seem to work right just yet. I'll keep toying with it and resubmit.

[Ismael-VC]

@FTWynn I have created new PR #12 Could you check it out?

[Ismael-VC]

I think it didn't work as you have it, because you have to start on C3 not C4, so either way you select "16 holes..." plus "Low C" key or you have to put something like this:

        var C3 = 48;
        var C4 = 60;
        var chromatic16Tuning = 13;

        if (harpkey == C4 && harp.tuning == chromatic16Tuning) {
            harpkey = C3;
        }