add removeBOM.sh script to remove BOM(windows style)
添加removeBOM.sh脚本以移除BOM（Windows样式）

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
Merge branch 'sources' into projects

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>
remove BOM and add newline at end of file in project directory
去除project目录中文件BOM，添加文件结尾换行符

Signed-off-by: Wanpeng Song <swpustc@mail.ustc.edu.cn>