Figure and text in Introduction section are redundant

[jlcohoon]

Related to issue #7

The figure after Exercise 1 is meant to summarize the content that follows, but this isn't immediately obvious and so lesson readers are likely to read the figure and the text, making their learning time unnecessarily longer. Below are some thoughts on how to address the issue, but other contributors might have different ideas. A goal is to make the content more easily skimmed.

Possible approaches to reducing redundancy and time required for learning:

• cut the figure
• make some of the content bullet points

Before addressing this issue, please leave a comment describing your approach so that others can assist without duplicating work. Tag a reviewer (e.g. @jlcohoon) as well.
Please check that the "Overview" and "Key Points" don't need adjusting after your edits

Carpentries info on formatting the different kinds of callouts and collapsable content like exercises might be useful: https://carpentries.github.io/sandpaper-docs/instructor/component-guide.html
https://carpentries.github.io/lesson-development-training/lesson-content.html#adding-exercises

[jlcohoon]

We've moved and updated content in the intro; I think this can be closed now