Minor example fix in Number helper
Added 1.6.4 to changelog page
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 824304f..6c910b8 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -57,6 +57,15 @@
 

 <h1>Change Log</h1>

 

+<h2>Version 1.6.4</h2>

+

+<p>Release Date: In development<br />

+SVN Revision: XXXX</p>

+

+<ul>

+	<li>No changes currently</li>

+</ul>

+

 <h2>Version 1.6.3</h2>

 <p>Release Date: June 26, 2008<br />

 SVN Revision: 1227</p>