Webpack

[ughe]

Switched to webpack instead of using browserify every time web3 or ethers changes.

Changes:

• index.html now only includes main.js script (created by webpack) and bootstrap.min.js
• src renamed to dist and the original src/js/app.js moved to src/app.js
• Added webpack.config.js to create main.js and run with yarn dev or yarn start
• Modified app.js to use common js i.e. const ArbProvider = require('arb-web3-provider')