Rename update script and update some documentation.

src/scripts/image_to_live.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Script to update an image onto a live running ChromiumOS instance.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
@@ skipping 43 matching lines @@
   echo ""
 }
 
 # Copys stateful update script which fetches the newest stateful update
 # from the dev server and prepares the update. chromeos_startup finishes
 # the update on next boot.
 function copy_stateful_update {
   echo "Starting stateful update."
   local dev_dir="$(dirname $0)/../platform/dev"
 
-  # Copy over tar files.
-  remote_cp "$dev_dir/stateful_update.sh" "/tmp"
-  remote_sh "/tmp/stateful_update.sh"
+  # Copy over update script and run update.
+  remote_cp "$dev_dir/stateful_update" "/tmp"
+  remote_sh "/tmp/stateful_update"
 }
 
 function prepare_update_metadata {
   remote_sh "mount -norw,remount /"
 
   if [[ ${FLAGS_ignore_version} -eq ${FLAGS_TRUE} ]]; then
     echo "Forcing update independent of the current version"
     remote_sh "cat /etc/lsb-release |\
         grep -v CHROMEOS_RELEASE_VERSION > /etc/lsb-release~;\
         mv /etc/lsb-release~ /etc/lsb-release; \
@@ skipping 130 matching lines @@
   fi
 
   remote_sh "grep ^CHROMEOS_RELEASE_DESCRIPTION= /etc/lsb-release"
   local release_description=$(echo $REMOTE_OUT | cut -d '=' -f 2)
   echo "Update was successful and rebooted to $release_description"
 
   return 0
 }
 
 main $@