对标准MIDI文件解析，解析头部，轨道，解析meta,sysex,midi消息-to standard MIDI parse, parse the head track and meta-analytic, sysex. midi news

本程序引入了一组类CMidiFile、CMidiTrack、CMidiEvent来封装有关MIDI的接口、结构和消息，用于实现MIDI产生器的功能。-the procedures introduced a cluster CMidiFile, CMidiTrack. Packaging CMidiEvent to the MIDI interface, structure and information, for the realization of MIDI generator functio