Merged Selection tools: a popup asks wether to save/copy text or gfx.
Added 'continous zooming' using mid mouse button. Clipped selections to viewport. Fixed a bad rounded float-to-int conversion (gives more pixel precision in zooming). CCMAIL: firstname.lastname@example.org svn path=/branches/kpdf_experiments/kdegraphics/kpdf/; revision=363468
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