This is what an entity looks like:

```yml
# inherited from File Entity
path: My Posts/My-Old-Name.html
lastModifiedDate: 2015-07-04T13:56:01Z
createdDate: 2015-07-04T13:56:01Z
contents: "..." # whatever the file is

# inherited from Collection Entity
name: My-Old-Name.html
relativePath: My Posts
ext: .html
collection: posts

# inherited from Content Entity
frontmatter: '---\n...\n---' # frontmatter as a string
yml: {} # frontmatter, parsed
body: "I think ..." # body, after frontmatter

# inherited from Normalized Entity
title: My Title # yml.title | titlize(entity.name)
slug: my-title # slugify(title)
slug_path: my-posts # slugifyPath(relativePath)

year: 2014
month: 07
day: 04
hour: 13
twelve_hour: 1
meridian: pm
minute: 22

categories: ["tech"]
tags:
  ["http", "url", "website"]

  # includes index.html
relative_file:
  /posts/foo/index.html

  # excludes index.html
relative_href:
  /posts/foo/

  # actual url of this file, even if redirect
  # excludes index.html
url:
  http://dev.example.com/posts/foo/

  # the appropriate url, even in a redirect or duplicate
  # excludes index.html
canonical_url:
  http://dev.example.com/posts/foo/

  # production url, even in development (for disqus, etc)
  # excludes index.html
production_url: http://example.com/posts/foo/
```

Note: The option `env.explicitIndexes` turns on `/index.html`. This option is automatically turned on when Dropbox is the host.

## TODO

- path relative from / in the browser
- path relative from base_path on the file system