BMidiPort is finished

Yes I know need testing and debugging (I hope not a lot)
That class is fully compatible with the header from Be.
3 private functions(Dispatch(...), Read(...), Write(...)) and 2 private 
data (=5Fm=5Fprev=5Fcmd, =5Fm=5Fenhanced) are not used.

Matthijs I don't use "your" naming variable style sorry but if you want 
to change there name you can do it freely.

Matthijs I will send you privately an image (as soon I draw it) who 
explain how work BMidiPort.

Next mission writing BMidiStore ok=3F

A+ (and good night)
Jerome