Add !iconic command

Should embed the following image:
https://i.imgur.com/k7FjY1m.jpg

👴📈

```
    elif message.content.startswith('!iconic'):
        msg = discord.Embed()
        msg.set_image(url="https://i.imgur.com/k7FjY1m.jpg")
        yield from channel.send(embed=msg)
```