Move Docusaurus 1 files into directory (#966)

* Move Docusaurus 1 into v1 directory

* Update Circle CI commands for new v1 dir

* Remove OC

* Fix tests

v1/lib/core/MarkdownBlock.js

@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const React = require('react');
+const Remarkable = require('./Remarkable');
+
+/**
+ * The MarkdownBlock component is used to parse markdown and render to HTML.
+ */
+class MarkdownBlock extends React.Component {
+  render() {
+    return <Remarkable source={this.props.children} />;
+  }
+}
+
+module.exports = MarkdownBlock;