Update styling to match new Chrome/devtools flat design.

What would you like to be added:

It would be amazing to have a "Deploy with Heroku" button. Someone please help and build this.

https://devcenter.heroku.com/articles/heroku-button

Why is this needed:

It would be nice to have English UI strings extracted to a yml file to allow support for other locales.

We're liable to run into some RTL and spacing challenges once other translations are added, but we can address those as they arise. Ideally dates/times should be localized (as we they are currently locked to English in #407)

Description

Story book is not showing the components

Reproduction Steps

1. open storybook - http://design.if-me.org/
2. open any available component - http://design.if-me.org/?path=/story/components-header--with-no-active-link
3. observe error instead of a component view

undefined is not an object (evaluating 'new _marked.default.Renderer')

Screenshots

<img width="192

Currrently , the CLI outputs "No such file or directory" but should be more verbose and explain which file could not be found.

No such file or directory (os error 2)

Post description and comments should support markdown.

I believe markdown would be particularly useful to format hyperlinks, lists and quotes.

However, some markdown tags should not be parsed as usual (or not be parsed at all): for example a user should not be able to post a comment formatted with header ("#" character in markdown), because then the comment text would too big.

If you PATCHed to /posts/1, but send payload with a different id:

{
  data: {
    id: 789,
    type: 'posts',
    attributes: { ... }
  }
}

We pay attention to the payload and not the URL - instead let's throw an error when there is a mismatch.