Put IBM copyright into the files

ipmi_command.py

@@ -1,3 +1,4 @@
+# Copyright 2013 IBM Corp.
 from ipmi_session import ipmi_session, call_with_optional_args
 def _raiseorcall(callback,response,args=None):
     if callback is None:

ipmi_constants.py

@@ -1,3 +1,4 @@
+# Copyright 2013 IBM Corp.
 
 
 payload_types = {

ipmi_session.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+# Copyright 2013 IBM Corp.
 # This represents the low layer message framing portion of IPMI
 import os
 import select