* Ensure Edit this Doc links always point to the master source of truth, and not a particular version
* Only show Edit this Doc link if editUrl has been set
* Add Prettier formatting to source files and example files, and check that Prettier formatting is maintained on PRs
* Remove trailing-comma as we are using Node 6 on Circle
* Use latest Node 6 LTS version in Circle
* Remove unused test
* Add the ability to provide custom layout
When I designed the system, I added the ability to provide a custom layout that would use arbitrary JavaScript to render some custom pages. This is why files are called "DocsLayout.js", "BlogPostLayout.js"... This ability to customize it was [ripped out](https://github.com/facebook/react-native/blob/master/website/server/convert.js#L78) during the migration to Docusaurus but I need it for the project I'm working on right now (that should remain unnamed!).
This adds back the ability to do it in a way that fits the third party system. In order to provide a new layout:
1) Add a `layout` field in the header of your markdown file:
```js
---
layout: mylayout
---
```
2) In your `siteConfig`, add
```js
layouts: {
mylayout: function({React, Marked}) {
return class extends React.Component {
render() {
return React.createElement('div', {}, this.props.metadata.layout);
}
}
}
}
```
I think that it's a reasonable to add and would unblock me :)
* Update DocsLayout.js
