fix)). Also took care of bug 3145 (zillions of 'main_loops !=
	NULL' assertion failures when quitting) and bug 3138 (Some code in
	the icon factory is cut and pasted from elsewhere). And a few
	unrelated things that came up while I was busy working on these.

	* configure.in: Applied patch from Dan Winship to fix handling of
	CFLAGS and LDFLAGS. Fixes some missing quoting and other mistakes.

	* libnautilus-extensions/Makefile.am:
	* libnautilus-extensions/nautilus-icon-factory-private.h:
	* libnautilus-extensions/nautilus-thumbnails.c:
	* libnautilus-extensions/nautilus-thumbnails.h:
	Broke out the thumbnailing code into its own source file for
	clarity.

	* libnautilus-extensions/nautilus-directory.c:
	* libnautilus-extensions/nautilus-file-utilities.h:
	* libnautilus-extensions/nautilus-file-utilities.c:
	(nautilus_make_directory_and_parents):
	Moved nautilus_make_directory_and_parents into a place where the
	thumbnail code can share it ...