fix begiak queues deletion
completed by: Jakub Lukes
Modify the queue module for Begiak (our IRC bot) so that when admins try to delete a queue by full name (e.g. nick:queue), it doesn't give an error message. Make sure that it gives a smart error message when the queue doesn't exist. For this task, you should fork the bot on github and send a pull request when you're done.
For further information and guidance on this task, you are encouraged to come to our IRC channel.