gobject-2.0: Annotate another GSignal function taking instances

As a followup to commit a72983a, annotate g_signal_handlers_destroy() as well.
2.37.7
bump version
Updated Korean translation
Visual C++ Builds: Fix "install" Projects

Due to the split up of the property sheets, the install projects did not
have info on the Intermediate and Output Paths, which caused confusing
messages from Visual Studio to show up upon completing build+"install" and
closing Visual Studio on whether to reload the install project, at least on
Visual Studio 2008.

Include the property sheet which defines these properties to fix this.
Updated Serbian translation
GFile: add new g_file_measure_disk_usage() API

This is essentially the equivalent of 'du'.

This is currently only supported on local files.  gvfs will add support for the
interface later.

https://bugzilla.gnome.org/show_bug.cgi?id=704893
tests/: add gio-du

This is basically a minimally-featured 'du' equivalent to manually test
g_file_measure_disk_usage().

https://bugzilla.gnome.org/show_bug.cgi?id=704893
Updated Spanish translation
Updated Slovenian translation
Trivial typo fix
gio/tests/network-address: fix SCOPE_ID_TEST_INDEX fallback
Updated Polish translation
Updated Brazilian Portuguese translation
[l10n] Updated Italian translation.
Updated Galician translations
Updated Czech translation
Updated Czech translation
Updated Latvian translation
Updated Belarusian translation.