checking in docs for github.io page

docs/step2-02/exercise/src/components/TodoHeader.tsx

@@ -0,0 +1,19 @@
+import React from 'react';
+import { FilterTypes } from '../store';
+
+export class TodoHeader extends React.Component<{}, {}> {
+  render() {
+    return (
+      <div>
+        <h1>todos</h1>
+        <input className="textfield" placeholder="add todo" />
+        <button className="button add">Add</button>
+        <div className="filter">
+          <button>all</button>
+          <button>active</button>
+          <button>completed</button>
+        </div>
+      </div>
+    );
+  }
+}