Migrate netlify-cms-www site into this repo (#860)

* Add frontmatter to docs files (prep to move)

* Move docs into position for website migration

* Migrate website from netlify-cms-www

Some modifications, including most of the changes in https://github.com/netlify/netlify-cms-www/pull/58 (previously reverted).

Also updated the readme and added hugo-bin for quicker onboarding of new docs contributors.

* Remove netlify.toml

This allows separate build commands for cms-demo and netlifycms.org.

* Remove website/netlify.toml

May re-add later, but it's not doing anything for now.

* Remove unused content file

website/site/data/docs.yml

@@ -0,0 +1,13 @@
+---
+styleoverrides: '/docs.css'
+headline: Netlify builds, deploys, and hosts your front end.
+bottomcta:
+  hook: Want to get started quick?
+  btns:
+    - type: primary
+      btntext: View our Templates
+      linksto: https://app.netlify.com/signup/templates
+    - type: secondary
+      btntext: Read our Tutorials
+      linksto: /tags/tutorial/
+---

website/site/data/global.yaml

@@ -0,0 +1,13 @@
+---
+footer:
+  hook: |
+    Host faster.</br>
+    Manage easier.</br>
+    Smile bigger.
+  headline: "Netlify is your one-stop web dev solution."
+  body: "Vestibulum rutrum quam vitae fringilla tincidunt. Suspendisse nec tortor urna. Ut laoreet sodales nisi, quis iaculis nulla iaculis vitae. Donec sagittis faucibu."
+  cta:
+    secondarycta:
+      copy: "Try it now FREE"
+      link: "/intro"
+---

website/site/data/landing.yaml

@@ -0,0 +1,50 @@
+---
+hero:
+  headline: An open-source CMS for your Git workflow
+  subhead: |
+    - Content management in a single-page app
+    - Built in React.js with extensible components
+    - Integrate with any build tool
+    - Plug in to any static site generator
+  ctas: |
+    - [Take it for a test drive →](/docs/test-drive)
+productvideo:
+  thumbnail: "/img/hero-graphic.jpg"
+  mp4: "/img/demo.mp4"
+  ogg: "/img/demo.ogg"
+  webm: "/img/demo.webm"
+
+thanksdevs: "**Thanks to all our contributors.**Keep shooting for the stars with Netlify CMS."
+
+collab:
+  hook: "Integrate the roles of developers, writers, and editors."
+  body: "Writers can focus on writing. Editors can approve content and publish with ease. Developers can use their favorite tools and libraries. **Netlify CMS keeps all of their contributions together, in Git.**"
+  graphicpath: "/img/collab.svg"
+
+featureshook: "Designed with developers in mind - it’s in our DNA."
+
+features:
+  - feature: "Fast, web-based UI"
+    description: "Built with React, featuring rich-text editing, real-time preview, and drag-and-drop media uploads."
+  - feature: "Platform agnostic"
+    description: "Works with most static site generators for sites stored in GitHub."
+  - feature: "Easy installation"
+    description: "Add two files to your site, include or link to the JS, and add your custom configuration."
+  - feature: "Modern authentication"
+    description: "Connect with Netflify's authentication service or roll your own, using GitHub and JSON web tokens."
+  - feature: "Flexible content types"
+    description: "Specify an unlimited number of content types with custom fields."
+  - feature: "Fully extensible"
+    description: "Create custom-styled previews, UI widgets, and editor plugins."
+
+featuresgraphic: "/img/helix.svg"
+
+inspiration: |
+  Netlify CMS is part of a long evolution in content management for the web. Even in the budding realm of the [JAMstack](https://www.jamstack.org) and [static site generators](https://www.staticgen.com), developers have a variety [“headless” CMS](http://www.headlesscms.org) options to choose from.
+
+  Proprietary services like Contentful and DatoCMS provide the ease and polish of a concierge provider, while simple open source projects like Prose and Google Drive CMS provide targeted functionality for limited use cases. We love that these other projects help advance the modern web, and we believe there will always be a place for them in the JAMstack ecosystem.
+
+  With Netlify CMS, we hope to carve a different niche. We aim to do for the JAMstack what WordPress did for dynamic sites back in the day. In other words, we want to build a CMS that is open-source but fully-featured and production-ready, that’s as easy to customize as it is to use, and that developers and content editors can build a community around.
+
+  [Help us make it happen!](/docs/contributor-guide)
+---

website/site/data/notifications.yml

@@ -0,0 +1,16 @@
+notifications:
+  - loud: true
+    message: >-
+      Register to join us online for our next community dev meeting, every other
+      Wednesday at 9am-10am PT!
+    published: false
+    title: Netlify CMS Development Planning Sessions Promo
+    url: >-
+      https://www.eventbrite.com/e/netlify-cms-planning-session-bi-weekly-tickets-35794058994
+  - loud: true
+    message: >-
+      We have a community on Gitter - join now to ask questions and discuss the
+      project with other devs!
+    published: true
+    title: Gitter shoutout
+    url: 'https://gitter.im/netlify/netlifycms'