v5.9

• Added -thumbnail to get the link of the thumbnail of a YouTube video
• Added and modified some help messages of ConfigEdit
• Added notification to -tv, -tw and -yt if the requested user doesn't exist
• Removed faulty devoicing of Geffy due to redundancy
• Fixed -tv not working
• Fixed Tweet vote notification showing incorrectly sometimes
• Fixed error in ShowTweet
• Fixed config lookup not working with non boolean values