Merge pull request opentelecoms-org#53 from vkosharskyi/patch-1

Update DeliveryReceiptState.java

Author: pmoerenhout

jsmpp/src/main/java/org/jsmpp/util/DeliveryReceiptState.java

@@ -21,6 +21,10 @@
  * 
  */
 public enum DeliveryReceiptState {
+    /**
+     * ENROUTE
+     */
+    ENROUTE(0),
     /**
      * DELIVERED
      */