Added 'includeantruntime' to remove ANT build warning.
Changed the PrintPreview flag to true.

For the rendering of voice parts the PrintPreview flag was set to false.
This caused all the notes of a voice to be squeezed into one line when
generating a PDF and with some of the variant versions in the parts window
view.

The single voice print issue is now solved for 2 cases:

1. When generating a PDF through the Menu "File > Generate
PDF.. > Parts > Generate..."
2. When opening the parts window through the Menu "View > View parts
window".
Changed the PDF rendering of voice parts.

Now each voice part is printed on a seperate page in de PDF.
Also set the page size of PDF to A4 Portrait.