Fixed bug 795 (help component installs files in nautilus prefix,
	but uses gnome-libs prefix to find them later) by expanding the
	set of places Nautilus looks for help files.

	* components/help/hyperbola-filefmt.c:
	(fmt_man_populate_tree_for_subdir): Changed to look in more places
	for help files: the help directory in the gnome prefix, the help
	directory in the nautilus prefix, and directories in GNOME_PATH.
	(fmt_help_populate_tree): New helper function.
	(append_help_dir_if_exists): New helper function.

	* components/help/Makefile.am: Define DATADIR in compile flags.

	* components/help/hyperbola-main.c: Add copyright notice.

	This part not reviewed:

	* .cvsignore, libnautilus-extensions/.cvsignore: gnore more
	things.

	* Makefile.am: distribute .in versions of xml-i18n-tools.