Populate key points across all episodes

[ragamouf]

The Reference page under "Extras" is a useful lesson tool, but requires all the episodes to have clear key points to draw from.

It could also be useful to rename "References" to Glossary, to avoid confusion with any user expecting a bibliography or list of references.

[ragamouf]

Or indeed even "Summary of key points"

Disambiguating key points from learning objectives and key questions:

1. Learning objectives are the highest level and focus on what the learner will learn
2. Key questions are lines of inquiry which lead the learner to consider what they need to find out in order to get to the learning objective.
3. Key points are the most granular, having built these up or taking these together are kind of like the answers or component parts of the answer to the key questions.