hotfixed guides/source/ko/command_line.md
updated the main.css
Merge pull request #18 from namsk/master

Translated working_with_javascript_in_rails.md
hotfixed guides/source/ko/working_with_javascript_in_rails.md
updated original link tag (one·all)
removed default ALL option in guides:generate:html:ko rake
translating source/ko/active_support_core_extensions.md
translating guides/source/ko/active_support_core_extensions.md
Merge pull request #19 from hschoidr/master

translating guides/source/ko/active_support_core_extensions.md, additional