* libnautilus-extensions/nautilus-directory.c:
	(nautilus_directory_notify_files_removed,
	nautilus_directory_notify_files_moved): Use
	`nautilus_file_get_existing', not `nautilus_file_get', to check if
	a file is already known. `nautilus_file_get' would have created
	new NautilusFiles and NautilusDirectories only to do redundant
	notification later in the function. Also, the old code was a bit
	silly because `nautilus_file_get' only returns NULL for a NULL
	URI.

	Work towards bug 3362, eliminate directory metadata.

	* libnautilus-extensions/nautilus-file-attributes.h: Added
	NAUTILUS_FILE_ATTRIBUTE_METADATA attribute.

	* libnautilus-extensions/nautilus-directory-async.c
	(set_up_request_by_file_attributes):

	* libnautilus-extensions/nautilus-wait-until-ready.h,
	libnautilus-extensions/nautilus-file.h,
	libnautilus-extensions/nautilus-directory.h,
	libnautilus-extensions/nautilus-directory.c,
	libnautilus-extensions/nautilus-fil...