add javadoc and remove unused method
remove unused method test
logging: Add Logging feature

* Use conf/application-logger.xml as configuration for logging, instead
  of application.conf.
* Log application and play log in logs/application.log, access log in
  logs/access.log and every log in logs/root.log.
* Add a user document about logging.
fix userinfo dropdown style of topmenu
apply HIVE CSS including trivial fix. delete milestone manage page that combined with milestone list page
code history, diff view UI fixed (HIVE-146, HIVE-145)
Merge pull request #49 from wansoon/DOC_USER

User 클래스 javadoc 추가 및 리팩토링
added JavaDoc and refactoring GitRepository class
Merge pull request #54 from keesun/javadoc/git-repository

[JavaDoc] GitRepository
Merge pull request #51 from npcode/feature/logging

logging: Add Logging feature
doc/access-control: Update some about temp files.

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