fixed fullscreen toolbars with multiple monitors

keep the toolbars on the main window monitor
Updated Greek translation
Updated Greek translation
Updated Slovenian translation
optimized the interpolation function

removed CLAMP from the interpolate_value function otherwise the
interpolation is calculated twice.
fixed error when rotating keeping the origina size
photobucket exporter: fixed crash when closing the dialog
Picasa Web exporter: images not displayed in the export dialog

[bug #679546]
grid view layout not updated if size_allocate is called before realize

[bug #679546]
Update Chinese simplified translation for ui
Updated German help translation
build: Fix parallel build problems with enum generation

If the enum rule is triggered because one of the dependencies changed, but the
resulting enum-types file is identical, it isn't copied across.  This causes
problems in parallel builds because make busy-loops on the file changing instead
of just running the commands sequentially.

The upshot is that a make -j where this happens (simply touching a .h file will
do it) will sit spinning inside make.

Fix this by pruning the dependencies to only those actually required, and doing
a mv instead of cmp||cp.  If the headers have been modified then we'll be
rebuilding anyway so the optimisation of the cmp is simply causing bugs.

https://bugzilla.gnome.org/show_bug.cgi?id=680925
bumped version number to 3.1.0
removed use of deprecated function gtk_widget_get_pointer
read system bookmarks from XDG_CONFIG_HOME/gtk-3.0/bookmarks

fallback to ~/.gtk-bookmarks if the new file is not found

[bug #675401]
use XDG_CACHE_HOME/thumbnails as thumbnail cache

Fallback to the old ~/.thumbnails directory if the new directory doesn't
exists.  Always use the new directory if  FORCE_XDG_THUMBNAIL_DIR is
defined in gnome-desktop-thumbnail.c.
ignore XDG_CACHE_HOME/thumbnails when saving thumbnails
thumb-loader: removed useless code

no need to check the existence of the thumbnails directory, it is already 
done in gnome_desktop_thumbnail_factory_save_thumbnail.
save and restore the window maximized state

[new feature]
grid view: align the caption to the left and use a smaller font