MIDI Import Panel

This is a GUI panel for MIDI import - frontend for different midi import functions. One can choose midi file to import and specify operations to perform on each midi track (selectable) during the import. More operations can be added in the future.

Here is how the panel looks like:
http://imageshack.us/photo/my-images/849/midiimportpanel.png/

It can be toggled in Display menu. Also it appears when midi file import is invoked.

Thanks David Bolton-2 for his thoughts on instant feedback for midi import:
http://dev-list.musescore.org/GSoC-MIDI-proposal-draft-tp7578046p7578048.html

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trig-ger