Clarify the import in docs

Fixes #263

Author: gaearon

docs/00 Quick Start/Tutorial.md

@@ -922,6 +922,11 @@ Finally, I'm adding a `canMoveKnight` check to the `handleSquareClick` method:
 
 -------------------
 ```js
+var canMoveKnight = require('./Game').canMoveKnight;
+var moveKnight = require('./Game').moveKnight;
+
+/* ... */
+
 handleSquareClick: function (toX, toY) {
   if (canMoveKnight(toX, toY)) {
     moveKnight(toX, toY);
@@ -930,6 +935,10 @@ handleSquareClick: function (toX, toY) {
 ```
 -------------------
 ```js
+import { canMoveKnight, moveKnight } from './Game';
+
+/* ... */
+
 handleSquareClick(toX, toY) {
   if (canMoveKnight(toX, toY)) {
     moveKnight(toX, toY);
@@ -1832,4 +1841,4 @@ Happy dragging and dropping.
 
 <img src='https://s3.amazonaws.com/f.cl.ly/items/1F2g2F0D470X0d0k2A1U/Screen%20Recording%202015-05-15%20at%2002.22%20pm.gif' width='404' height='445' alt='Screenshot'>
 
-Now go and [play with it](examples-chessboard-tutorial-app.html)!
+Now go and [play with it](examples-chessboard-tutorial-app.html)!