minor change
Merge branch 'master' of https://github.com/namwkim/namwkim
Merge branch 'master' of https://github.com/namwkim/namwkim
Merge branch 'master' of https://github.com/namwkim/namwkim
Merge branch 'master' of https://github.com/namwkim/namwkim
Merge branch 'master' of https://github.com/namwkim/namwkim
gitignore modified