label: Rewrite javadoc in English
translate all korean javadoc which are written by Changsung Kim to english.
message-file: modify message file sentences
translate-comments: Milestone.java

- remove redundant method comments
- translate korean to english
AUTHORS: Modify content
UserIdent.java: translate comments
English Composition: TOC and project about user manual.
English Composition:

About project setting in user manual.
docs: Rewrite logging.md in English
docs: Rewrite label-typeahead.md in English
docs: Rewrite the coding style guide in English
English Composition : Project Member about user manual.
javadoc: rewrite app.models.UserProjectNotification.java in english
javadoc: rewrite app.models.UserIdent.java in english
javadoc: rewrite app.models.User.java in english
English Composition : Notitifications about user manual.
javadoc: rewrite app.models.* in english

  - app/models/PullRequestCommit.java
  - app/models/PullRequestEvent.java
  - app/models/PullRequestEventMessage.java
  - app/models/PullRequestMergeResult.java
  - app/models/SiteAdmin.java
English Composition : Issue
English Composition : Pull Request
English Composition: Group