Hosting on Heroku

[alexg622]

• [x] Initial push to heroku
• [x] Remove console statements: debuggers, console.logs, errors, minification warnings, mixed content warnings
• [x] Use dev tools in dev environment
• [ ] Custom domain name

[xnanodax]

For heroku, the bullet points should look like: https://github.com/appacademy/bluebird/issues/22