Created by: wangkuiyi

Fixes https://github.com/PaddlePaddle/Paddle/issues/737

1. Baidu Inc. ==> PaddlePaddle Authors
2. Reserve ==> Reserved

The PR was generated by running the following Bash script at the root of the source tree:

for i in $(du -a | cut -f 2); do
    if [[ -f $i ]]; then
	if head -n 1 $i | grep '/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.'; then
	    sed -isubbackup 's/\/\* Copyright (c) 2016 Baidu, Inc. All Rights Reserve./\/\* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved./' $i;
	fi;
    fi;
done