New QPageLayout to encapsulate page layout details including page size,
orientation and margins. Scale may be added later.
Subsequent changes will use this class in the paged paint devices,
paint engines, print engines, and print plugins to replace multiple
inconsistent local implementations.
[ChangeLog][QtGui] Added class QPageLayout to support handling page
layouts including the page size, orientation and margins.
Change-Id: Ife1ddd6c2a8d1516542be2eb37425111f41cd5c7
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
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