even slower than it ought to be. The hysteresis wasn't working at
	all because of the confusion about when files were ready for
	display. Also changed hysteresis to 1 second and file chunk to 300
	files instead of 100.

	* libnautilus-private/nautilus-directory-async.c:
	(link_info_gmc_link_read_callback): Fix function so it uses the
	actual URI, not the thing that starts with URL. The old way it
	was always failing to read. There were some other backwards if
	statements in here too.

	* src/file-manager/fm-directory-view.h:
	* src/file-manager/fm-directory-view.c:
	(fm_directory_view_initialize): Create "non-ready files" hash.
	(fm_directory_view_destroy): Destroy it.
	(real_file_still_belongs): Move this here from FMListView.
	(still_should_show_file): New function, used to decide whether to
	keep a file in the window or not.
	(ready_to_load): New function, used to decide whether a file is
	ready enough to show in the window.
	(process_new...