Squashed commit of the following:

commit 1daa24fc8612efe714b63ff5fdf644cb07a6cf56
Author: mtatsuya <tatsuya_murayama@kme.biglobe.ne.jp>
Date:   Wed Jun 11 22:42:47 2014 +0900

    contributor、publisherの編集に対応

commit 1a6ee9119ea7c5f50891364c4c31540a3a3cab32
Author: mtatsuya <tatsuya_murayama@kme.biglobe.ne.jp>
Date:   Wed Jun 11 17:18:58 2014 +0900

    creatorの編集に対応

commit 027ac9d9dd3fe092ebc94d3260795393517310a9
Author: mtatsuya <tatsuya_murayama@kme.biglobe.ne.jp>
Date:   Tue Jun 10 22:40:00 2014 +0900

    subjectの編集に対応