added 1.7.1 placeholder to changelog
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index b57bf22..03ff728 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -57,6 +57,12 @@
 

 <h1>Change Log</h1>

 

+<h2>Version 1.7.1</h2>

+<p>Release Date: not yet released<br />

+SVN Revision: </p>

+

+

+

 <h2>Version 1.7</h2>

 <p>Release Date: October 23, 2008<br />

 SVN Revision: 1541</p>