README and examples issues

[pietrop]

A good list of things to sort out in the README and rest of the repo by @gridinoc

• 1. const alignJSONText = require('./index.js'); -> no index.js, if you require src/index.js still dies as there is no function exported by default
• 2. "See /lib/example-usage for an example that you can run with npm run example." there is no /lib
• 3. babel-loader and gh-pages should be devDependencies
• 4. the demo is useless, I get a page asking for files I don't have
• 5. package.json: "main": "lib/index.js", well, no /lib again

Leaving it as a note for when I get a chance to do a PR

[Laurian]

Note that if npm install fails on macOS Catalina, run first npm i -g node-gyp@latest && npm config set node_gyp "/usr/local/lib/node_modules/node-gyp/bin/node-gyp.js" see nodejs/node-gyp#1779 (comment)