Added changelog entry
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index fb6e449..cdbbe6b 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -77,6 +77,7 @@
<li>Added <samp>increment_string()</samp> to <a href="helpers/string_helper.html">String Helper</a> to turn "foo" into "foo-1" or "foo-1" into "foo-2".</li>
<li>Altered form helper - made action on form_open_multipart helper function call optional. Fixes (#65)</li>
<li><samp>url_title()</samp> will now trim extra dashes from beginning and end.</li>
+ <li>Improved speed of <a href="helpers/string_helper.html">String Helper</a>'s <b>random_string()</b> method</li>
</ul>
</li>
<li>Database