MidiStore Sort function

If no one know were is the problem in this function I will write it without using 
BList::SortItem(..).


PS 1 : Matthijs you do a really hard stuff for understanding Midi2 and writing all the 
documentation. The world will remenber you ;-)

PS 2 : But now the bad news of the week :
I haven't the knowledge for writing the Midi 1 Synth (How make PitchShifting and add 
reverb in real time? I think I can do all other things on this class but there is not a lot 
of other things :-(

A+
Jerome