Glib viewer preferences
This is a merge request following the one which adds handling of more viewer preferences into core poppler (!162 (merged)). This one adds API to access Duplex, NumCopies and PrintPageRange preferences from glib frontend.
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This is a merge request following the one which adds handling of more viewer preferences into core poppler (!162 (merged)). This one adds API to access Duplex, NumCopies and PrintPageRange preferences from glib frontend.