ABC import update for MuseScore 2.0

Hi everyone!

I rewrote most of the ABC Import plugin to make it work on MuseScore 2.0 (and learn a bit more about QML). Almost everything is working, except that after loading the file with the read() function, the global string looses all it's line breaks. I haven't found how to read the file line by line like in the older version of the plugin.

Otherwise, there's a problem with large tunes. In those cases, we get the error message "Request-URI Too Large". To solve the problem, we would need to do a "Post" request with the XMLHttpRequest instead of a "Get" request. Though, you would need to update the server-side script to handle it.

The last thing I'm struggling with is the size of the plugin window. Whatever the dialog plugins I try, it always opens in a small window around 150x150 on the upper left side of the screen, so I need to enlarge the windows with the mouse. Not sure if that could be a QtQuick bug.

Oh, one last thing, when an ABC tune is imported after pasting it, there is a lot of message "TempoMap: empty" appearing in the console.

I included here the new version of the plugin.

If you have advices or could forward/guide me. Thanks,

Stéphane Groleau

P.S. I wanted to attach the .QML file directly, but this forum system doesn't allows this file extension.