slick.sample.conf missing

Hi, I just wanted to highlight that this file is missing :) Also, when I take plotbot.sample.conf , I have:

```
./example-bot
2018/04/19 14:58:07 LoadConfig(): Error unmarshaling JSON invalid character '"' after object key:value pair
2018/04/19 14:58:07 Error loading Slack config section: invalid character '"' after object key:value pair
```