Clean up location transform in map

src/components/presentational/TimelineHeader.js

@@ -0,0 +1,15 @@
+import React from 'react';
+
+const TimelineHeader = ({ title, date0, date1, onClick }) => (
+  <div className="timeline-header">
+    <div className="timeline-toggle" onClick={() => onClick()}>
+      <p><i className="arrow-down"></i></p>
+    </div>
+    <div className="timeline-info">
+      <p>{title}</p>
+      <p>{date0} - {date1}</p>
+    </div>
+  </div>
+);
+
+export default TimelineHeader;