Merge pull request activeadmin#641 from fbuenemann/fixes/fix_breadcrumb_model_i18n

Fix breadcrumb_helper plural model i18n

Author: mattvague

lib/active_admin/view_helpers/breadcrumb_helper.rb

@@ -20,7 +20,7 @@ def breadcrumb_links(path = nil)
 					end
 					name = part.titlecase if name == ""
 					begin
-						crumbs << link_to( I18n.translate!("activerecord.models.#{part.singularize}"), "/" + parts[0..index].join('/'))
+						crumbs << link_to( I18n.translate!("activerecord.models.#{part.singularize}", :count => 2), "/" + parts[0..index].join('/'))
 					rescue I18n::MissingTranslationData
 						crumbs << link_to( name, "/" + parts[0..index].join('/'))
 					end