Add javadoc for Attachment model.
Merge pull request #91 from npcode/javadoc/attachment

Add javadoc for Attachment model.
fix searchform in navbar
Remove an unnecessary line added by mistake.
Tag: use update() instead of save().
gitignore: Add "nohup.out" and "tags".
PasswordResetApp: add javadoc
GitApp: Refactoring

* Remove unnecessary Content-Type setting.
* Replace getting query string with getting parameter.
* Remove unused Exception.
* Remove unnecessary debug logs.
Merge pull request #95 from doortts/doc/password-reset-app

PasswordResetApp: add javadoc