vignette on how to put model results in a table

[waddella]

see the working code in the slides with 2 examples:

1. using broom
2. create a results data.frame

Not too much text is needed.

[danielinteractive]

We have one now internally, maybe that can be extended and then reused.

[danielinteractive]

Maybe @gmbecker and @waddella can have a look at it.