Update Elsevier press release and frontpage feed

lms/templates/feed.rss

@@ -8,6 +8,15 @@
   <title>EdX Blog</title>
   <updated>2012-07-16T14:08:12-07:00</updated>
   <entry>
+    <id>tag:www.edx.org,2012:Post/5</id>
+    <published>2012-09-25T14:00:00-07:00</published>
+    <updated>2012-09-25T14:00:00-07:00</updated>
+    <link type="text/html" rel="alternate" href="${reverse('press/elsevier-collaborates-with-edx')}"/>
+    <title>Elsevier collaborates with edX</title>
+    <content type="html">&lt;img src=&quot;${static.url('images/press/foundations_of_analog_x109.jpg')}&quot; /&gt;
+      &lt;p&gt;&lt;/p&gt;</content>
+  </entry>
+  <entry>
     <id>tag:www.edx.org,2012:Post/4</id>
     <published>2012-09-06T14:00:00-07:00</published>
     <updated>2012-09-06T14:00:00-07:00</updated>