page, hiding others and redefining contents area. Bookmark action moved to
document, that updates observers state after each operation. Many fixes in
pageview. Pixmapwidget returns a const KPDFPage*. No scroll-on-drag and
go-to-page only with left click onThumbnailList. Starting to reorganize
PageView events (link test with cursor changing on page sample impl.).

svn path=/branches/kpdf_experiments/kdegraphics/kpdf/; revision=350583