Webpack needed to improve JS file structure

[shaunanoordin]

We need to organise the JavaScript file(s), which currently all exists as the monolithic main.js. We'll need to split the JS code across multiple files, which means we'll need to use ES6 import to organise multiple 'class files', which means we'll need Webpack.

Take a look at shaunanoordin/starter-web-app#3

[shaunanoordin]

Also, while we're at it, maybe update package.json to have a proper name, like avo-adventure.

[shaunanoordin]

Closed via #11