Add website to mono repo, update packages to align with existing sub-packages, use new subscribeAsync 0x.js method

packages/website/ts/pages/shared/markdown_code_block.tsx

@@ -0,0 +1,20 @@
+import * as _ from 'lodash';
+import * as React from 'react';
+import * as HighLight from 'react-highlight';
+
+interface MarkdownCodeBlockProps {
+    literal: string;
+    language: string;
+}
+
+export function MarkdownCodeBlock(props: MarkdownCodeBlockProps) {
+    return (
+        <span style={{fontSize: 16}}>
+            <HighLight
+                className={props.language || 'js'}
+            >
+                {props.literal}
+            </HighLight>
+        </span>
+    );
+}