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/webpack.conf.js

@@ -0,0 +1,37 @@
+import webpack from "webpack";
+import path from "path";
+
+export default {
+  module: {
+    loaders: [
+      {
+        test: /\.((png)|(eot)|(woff)|(woff2)|(ttf)|(svg)|(gif))(\?v=\d+\.\d+\.\d+)?$/,
+        loader: "file?name=/[hash].[ext]"
+      },
+      {test: /\.json$/, loader: "json-loader"},
+      {
+        loader: "babel",
+        test: /\.js?$/,
+        exclude: /node_modules/,
+        query: {cacheDirectory: true}
+      }
+    ]
+  },
+
+  plugins: [
+    new webpack.ProvidePlugin({
+      "fetch": "imports?this=>global!exports?global.fetch!whatwg-fetch"
+    })
+  ],
+
+  context: path.join(__dirname, "src"),
+  entry: {
+    app: ["./js/app"]
+  },
+  output: {
+    path: path.join(__dirname, "dist"),
+    publicPath: "/",
+    filename: "[name].js"
+  },
+  externals:  [/^vendor\/.+\.js$/]
+};