adding copyright header

Signed-off-by: Christopher Guindon <chris.guindon@eclipse.org>
diff --git a/content/en_index.php b/content/en_index.php
index cbf721b..161c8d9 100644
--- a/content/en_index.php
+++ b/content/en_index.php
@@ -1,3 +1,16 @@
+<?php
+/*******************************************************************************
+ * Copyright (c) 2014 Eclipse Foundation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Christopher Guindon (Eclipse Foundation) - Initial implementation
+ *******************************************************************************/
+?>
+
 <div class="timeline">
 <div class="row">
     <div class="col-md-6 one gs-item">