Move plugins to separate directory.

plugins/messages/lib/foodsoft_messages/engine.rb

@@ -0,0 +1,19 @@
+module FoodsoftMessages
+  class Engine < ::Rails::Engine
+    def navigation(primary, context)
+      return unless FoodsoftMessages.enabled?
+      return if primary[:foodcoop].nil?
+      sub_nav = primary[:foodcoop].sub_navigation
+      sub_nav.items <<
+        SimpleNavigation::Item.new(primary, :messages, I18n.t('navigation.messages'), context.messages_path)
+      # move to right before tasks item
+      if i = sub_nav.items.index(sub_nav[:tasks])
+        sub_nav.items.insert(i, sub_nav.items.delete_at(-1))
+      end
+    end
+
+    def default_foodsoft_config(cfg)
+      cfg[:use_messages] = true
+    end
+  end
+end