contact sheet: use simbolic icons
contact sheet: fixed error when closing the dialog

disconnect from the selection changed signal 
before destroying the dialog.
contact sheet: fixed painting of the scaled image
contact sheet: fixed warning
Command line ignored for the second window

[bug #712716]
added attribute Exposure to show the exposure settings

in the file list is convenient to show the exposure settings on a
single line
exposure: prefix the iso speed field with 'ISO'
Rotating image destroys XMP and IPTC metadata

[bug #719622]
file properties: show only the basic properties, allow to show all of them
browser: removed the shadow from the tree view
image viewer: do not update the visibility if not active
added a custom tiff loader
tiff saver: renamed some functions
image viewer: update the image quality after setting the image
Updated Czech translation
Updated Spanish translation
Fix translator-credits
Updated Spanish translation
redeye: derive from GTH_TYPE_IMAGE_VIEWER_PAGE_TOOL
Updated Spanish translation