Start translating ko/getting_started.md
오타수정
Fix error: TIP:
Fix minor typo
Translated chap3 except table
Finish 3(chapter)/11 Translating
Fix typo in chapter 3
security.md 번역 중...
Merge pull request #53 from corzej/master

Start translating ko/getting_started.md
Merge pull request #55 from hschoidr/master

security.md 번역중
Merge branch 'master' of https://github.com/RORLabGuides/docrails