update README.md description
更新README.md描述

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>
Removed <GNUHardLinkInsteadofCopyOthers> item value
移除<GNUHardLinkInsteadofCopyOthers>属性表值

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>
Set <GNUcopybash> using copy not hardlink
设置<GNUcopybash>使用复制而不是硬链接

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>
Removed <GNUHardLinkInsteadofCopyOthers> in README.md
在README.md中移除<GNUHardLinkInsteadofCopyOthers>

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>
Merge branch 'fix-hardlink-others' into dev-2

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>
rename LICENSE document (LESSER GENERAL PUBLIC LICENSE Version 3)
LICENSE重命名为LICENSE.LGPLv3

Signed-off-by: 宋万鹏 <swpustc@mail.ustc.edu.cn>