Review with "Beginner's Mind"

[nelsonic]

We need this tutorial to be reviewed by a person who is reasonably new to both JavaScript and the Elm Architecture so that we can:

• [ ] confirm that the steps are clear
• [ ] check code is well explained
• [ ] ensure nothing is implied/assumed that should be explicit

@edwardcodes please can you read through the instructions in this tutorial, try the examples and open any issues when anything is unclear? (thanks!)

[ghost]

@nelsonic Yes no problem!