MusicXML import of "none" text for <bar-style> element is ignored.

Invisible barlines in imported MusicXML files are ignored, such as:

<barline location="right">
   <bar-style>none</bar-style>
</barline>

Attached is a sample MusicXML file with an example barline which has been made invisible using the "none" style.

This feature is useful when generating short musical examples which stop in the middle of a measure (such as this example), or for music which does not use barlines.