Updated changelog for pull request #296 (added MIME headers)

changelog.html

@@ -55,6 +55,8 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
+  <li class=rfe>
+    Added MIME headers with job name and build result to notification emails.
   <li class=bug>
     "Changes" in Build Summary broken in IE standard mode since 1.434
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11383">issue 11383</a>)