Squashed commit of the following:

commit d7b2ed0d0e151318be9bf67a174a2c942ddab7aa
Author: zomeki <zomeki@zomeki.jp>
Date:   Thu May 22 16:56:14 2014 +0900

    Rebuild content "GpArticle"

commit c639691c640eca697ce5487595e2f6863f508530
Author: zomeki <zomeki@zomeki.jp>
Date:   Thu May 22 11:39:59 2014 +0900

    Add rebuild action

commit 15a281926d0c6cabf10d45c40afdf6bb43544e89
Merge: 9f95046 7d1c677
Author: zomeki <zomeki@zomeki.jp>
Date:   Wed May 21 02:12:28 2014 +0900

    Merge branch 'rebuild-contents' of github.com:zomeki/zomeki-development into rebuild-contents

commit 7d1c677acdb97f635d6d5cb24db9fafdbfc87045
Author: zomeki <zomeki@zomeki.jp>
Date:   Tue May 20 17:04:45 2014 +0900

    Ready to add new action
Merge branch 'master' of github.com:zomeki/zomeki-development