Move plugins to separate directory.

plugins/messages/lib/foodsoft_messages/user_link.rb

@@ -0,0 +1,26 @@
+module FoodsoftMessages
+
+  module UserLink
+    def self.included(base) # :nodoc:
+      base.class_eval do
+
+        # modify user presentation link to writing a message for the user
+        def show_user_link(user=@current_user)
+          if user.nil? or not FoodsoftMessages.enabled?
+            show_user user
+          else
+            link_to show_user(user), new_message_path('message[mail_to]' => user.id),
+                                    :title => I18n.t('helpers.messages.write_message')
+          end
+        end
+
+      end
+    end
+  end
+
+end
+
+# modify existing helper
+ActiveSupport.on_load(:after_initialize) do
+  ApplicationHelper.send :include, FoodsoftMessages::UserLink
+end