Improvements to LGRecipe listing and override behavior
 	-- during recipe listing only enumerate 2 levels down (current autopkg behavior).
	-- on override creation, enable the override if the same name is used, and update the recipe_list.txt.
	-- on override removal, if it was active remove it from the recipe_list.txt
	-- minor purely aesthetic change to LGAutoPkgrTask by initializing an NSPipe object for stderr too (as is with stdout)