Added 'children_by_type' method to ChefObject class
Added 'children_by_type' method to ChefObject class

aleksey-hariton/yard-chef,rightscale-cookbooks/yard-chef,aleksey-hariton/yard-chef,aleksey-hariton/yard-chef,rightscale-cookbooks/yard-chef,rightscale/yard-chef,rightscale-cookbooks/yard-chef