Missing chromatinhd.data.motifscan.download in your tutorial

Hi ChromatinHD team, 

Congratulations on your exciting pre-print! I'm going through your tutorial, but cannot seem to import the following:

```
import chromatinhd.data.motifscan.download
```

I can't seem to find this in the github code either. Is the tutorial not updated to the most recent code (or vice versa)? Thanks so much!

Joe

