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

packages/website/ts/pages/documentation/source_link.tsx

@@ -0,0 +1,27 @@
+import * as React from 'react';
+import {colors} from 'material-ui/styles';
+import {Source} from 'ts/types';
+import {constants} from 'ts/utils/constants';
+
+interface SourceLinkProps {
+    source: Source;
+    version: string;
+}
+
+export function SourceLink(props: SourceLinkProps) {
+    const source = props.source;
+    const githubUrl = constants.GITHUB_0X_JS_URL;
+    const sourceCodeUrl = `${githubUrl}/blob/v${props.version}/${source.fileName}#L${source.line}`;
+    return (
+        <div className="pt2" style={{fontSize: 14}}>
+            <a
+                href={sourceCodeUrl}
+                target="_blank"
+                className="underline"
+                style={{color: colors.grey500}}
+            >
+                Source
+            </a>
+        </div>
+    );
+}