ros action and msg modifications for Look at

action/LookAtEntity.action

 # Define the goal
-int16      pan_target_id
+int16      body_id
 float32    timeout
 ---
 # Define the result

action/LookAtPosition.action

 # Define the goal
-int16      pan_target_id
+float32[]  look_at_position
 float32    timeout
 ---
 # Define the result

msg/LookAtPosition.msg

-float32[]  goto_target_pose  # pose (x, y, ang),local 1./global 0. flag, flag
\ No newline at end of file
+float32[]  look_at_position  # pose (x, y),local 1./global 0. flag, flag
\ No newline at end of file