notes: confirm note has been taken

config.json.example

@@ -41,6 +41,7 @@
     "notes": {
       "commands": ["note down"],
       "content_regex": "for (?P<target>\\S+) (?P<note>.+)",
+      "confirmation": "Ok.",
       "deliver_format": "{dest}, {sender} tells you: {message}"
     },
     "random": {

edmond/plugins/notes.py

@@ -55,3 +55,4 @@ class NotesPlugin(Plugin):
                 "message": message
             }
             self.append_storage_list_value("notes", note)
+            self.bot.say(event.target, self.config["confirmation"])