Implement various interactives into Field Guide

[eAlasdair]

The new interactives should be recreated in JS/CSS ready for the new chapter content

• Classification Trees
• Data Bias (@courtneycb)
• Data Representation (@eAlasdair)
• Data Size
• Data Velocity (Data Drop)
• Software Engineering (Bakery Simulator) (@courtneycb)

[courtneycb]

Software Engineering needs new graphics created for it. Unsure who will be doing this yet.