Add tutorial's second part todo list

src/index.js

@@ -2,6 +2,14 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import './index.css';
 
+/*TODO
+    Display the location for each move in the format (col, row) in the move history list.
+    Bold the currently selected item in the move list.
+    Rewrite Board to use two loops to make the squares instead of hardcoding them.
+    Add a toggle button that lets you sort the moves in either ascending or descending order.
+    When someone wins, highlight the three squares that caused the win.
+    When no one wins, display a message about the result being a draw.
+*/
 
 function Square(props) {
     return (