New features:
* Show preview of images when dragging them.
* Added "back/forward/reload/save as" actions to the KPart context menu
Fixes:
* Load JPEG rotated images using the right rotation directly instead of
loading them first and rotate them after.
* Fix crash when showing current folder properties from context menu.
* Do not show the name of the current file in the status bar: it's
already shown in the title bar and it was causing the mainwindow to
be enlarged if the name was very long.
* Show the "rotate left" button in KParts.
* Use Exiv2 instead of libexif to fix troubles with some JPEG.
* Fix crash when using Gwenview KPart in kwebdesktop.
* Fix content of KPart context menu when viewing remote images.
* Do not let the KPart title get overriden when switching tabs.
* Make context menu behavior coherent with KDE.
* Fix compilation with --enable-final
* Do not loose selection when switching from detail to thumbnail view.
* In KPart, do not loose selection when starting a drag.
* Fixed behavior of the middle-mouse button.
* Unless the user rotated the image, saving from the KPart now does a
copy of the image instead of recompressing it. This ensures the KPart
won't fail to save certain files.
