This removes the needs for Page to be a QObject (it's the PageController that connects to the jobs and emits the right signals), so it again a "cheap" object.
svn path=/trunk/playground/graphics/okular/; revision=646010
* Bring QPixmap* back to make Albert happy ;)
* Store only one QPixmap per page/size and rotate it directly
* Rotate ObjectRects (boundary)
* Rotate Annotations (point coordinates)
* Don't reload pixmaps, ObjectRects and annotations on rotation
svn path=/trunk/playground/graphics/okular/; revision=606371