Added missing arrayBuffer method.

doc/index.html

@@ -52,9 +52,14 @@
 <pre class="prettyprint source"><code>npm install js-md4</code></pre><h2>Notice</h2><p><code>buffer</code> method is deprecated. This maybe confuse with Buffer in node.js. Please use <code>arrayBuffer</code> instead.</p>
 <h2>Usage</h2><p>You could use like this:</p>
 <pre class="prettyprint source lang-JavaScript"><code>md4('Message to hash');
+
 var hash = md4.create();
 hash.update('Message to hash');
-hash.hex();</code></pre><p>If you use node.js, you should require the module first:</p>
+hash.hex();
+
+var hash2 = md4.update('Message to hash');
+hash2.update('Message2 to hash');
+hash2.array();</code></pre><p>If you use node.js, you should require the module first:</p>
 <pre class="prettyprint source lang-JavaScript"><code>var md4 = require('js-md4');</code></pre><p>It supports AMD:</p>
 <pre class="prettyprint source lang-JavaScript"><code>require(['your/path/md4.js'], function (md4) {
 // ...
@@ -93,7 +98,7 @@ md4.arrayBuffer(''); // ArrayBuffer</code></pre><h2>License</h2><p>The project i
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-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a> on Mon Jan 23 2017 15:12:38 GMT+0800 (CST)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a> on Tue Jan 24 2017 15:15:12 GMT+0800 (CST)
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