Protecting sensitive columns while displaying data-frames at Jupyter notebook (feature request)
Hi there!

Right now I'm working with pretty sensitive data - phone numbers, usernames, personal names and so on. Also, I'm using Jupyter notebooks for making reports and share the results with my colleagues. Tell me please - is it possible to specify some displaying settings, so some columns will be censored?

# Example

So the following command:

```python
> print (df)
         phone
0  79517123123
1  79517123923
2  79517123123
3  79517124123
4  79517115123
```

will become something like

```python
> print (df)
         phone
0  795*********23
1  795*********23
2  795*********23
3  795*********23
4  795*********23
```

# PR request

If right now it's not possible - I can make a PR with this feature. What do you guys think?

Thanks in advance!