Do things in procedural way

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Reduce and reposition information of file

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Add author, license information

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Modify introduction

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Add sufficient explanation on README

Signed-off-by: SeongJae Park <sj38.park@gmail.com>