Move printing into it's own library

Create a libQtPrintSupport library that contains our current
printing infrastructure. Long term this will get replaced
with a libQtPrint, as the current architecture is not
really maintainable.

Change-Id: I7362fff6786b58c5b4e9213c23eda36d15048aa2
Reviewed-on: http://codereview.qt.nokia.com/3209


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>