This didn't work before for several reasons: the trash attribute
namespace was not part of THUNARX_FILE_INFO_NAMESPACE and Thunar tried
to read trash::orig-file but it's actually trash::orig-path. Last but
not least, this one is not a normal but a byte string attribute.

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Hope this is done the right way. At least it makes Thunar compile again.

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Pass G_FILE_QUERY_INFO_NONE to thunar_io_scan_directory() instead of
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, otherwise that function is not able
to identify the type of the GFile as a G_FILE_TYPE_DIRECTORY.

Most of them are the new tooltip api in plugins and
GtkEntry -> GtkEditable functions.

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Also refactor the wallpaper plugin code a bit, so it
matches the thunar coding style.

For some reason "git merge --squash" didn't preserve squashed commit
information after resolving the conflicts manually. So here the changes
are explained in detail in the extra ChangeLog.

I'm 100% sure I can implement all ThunarVFS thumbnailers on top of
tumbler in time for the Xfce 4.8 release. Same about the volume monitor
backend for GIO to avoid a GVfs dependency. So why not merge the GIO
branch now?

Not much to say about this merge. It replaces ThunarVFS with GIO inside
Thunar and Thunarx, something I've been working on over the past few
months. It currently requires GVfs for volume monitoring and also
(optionally) depends on tumbler for thumbnail generation. Enjoy.

All .po files are going to be updated in the next commit.

Conflicts:
	ChangeLog
	INSTALL
	acinclude.m4
	configure.in.in
	plugins/thunar-wallpaper/twp-provider.c
	po-doc/ChangeLog
	po/ChangeLog
	po/LINGUAS
	thunar-vfs/thunar-vfs-1.pc.in
	thunar-vfs/thunar-vfs-thumb.c
	thunar/thunar-templates-action.c

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Use g_object_ref_sink() and gtk_radio_action_set_current_value()
instead.