Default project structure tree

[jonchurch]

Adds default project structure to readme:

.
├── app.js
├── bin
│   └── www
├── package-lock.json
├── package.json
├── public
│   ├── images
│   ├── javascripts
│   └── stylesheets
│       └── style.css
├── routes
│   ├── index.js
│   └── users.js
└── views
    ├── error.jade
    ├── index.jade
    └── layout.jade

Open to suggestions here. Definitely I think that there should be some explanation about the structure, but as it stands just adding this to the readme (IMO) improves the project because it documents things as they currently are.

This is in reference to https://github.com/expressjs/generator/issues/62, where I think we can continue to talk about documenting the structure.

[jonchurch]

I'm sorry, this is off topic but @dougwilson HOW did you label this seconds after I submitted?? Do you have automation setup to do that?

[dougwilson]

I interact with GitHub through email and I see & read just about every message that comes in as it comes in :) Depending on what I'm doing at the time I may or may not interact with it, depending on how much time it would take. I manually labeled it when I saw the email and was planning to take a closer look later, haha :)

[helio-frota]

The CI error is not related to the update on README.md. It seems to be a flakey travis build.