fixed bug 6312, information about translation in the about box,
	by adding a localizable string that is displayed in the lower
	left of the about box if it's changed from the default.

	fixed bug 6708, support link in help menu, by changing the uri to
	the real one we want to ship with, that currently points to a
	placeholder page.  Also, due to popular demand, renamed it back
	to "Support".

	* src/nautilus-about.c: (nautilus_about_new),
	(nautilus_about_draw_info):
	added a translators parameter, and used it to draw the translators
	credits if present.
	* src/nautilus-about.h:
	added translator parameter to nautilus_about_new
	* src/nautilus-shell-ui.xml:
	changed menu name to "support"
	* src/nautilus-window-menus.c: (help_menu_about_nautilus_callback),
	(help_menu_support), (nautilus_window_initialize_menus):
	renamed verb to support, changed link to point to intended support site.