Merge remote-tracking branch 'origin/sakuragi' into ootani
Merge remote-tracking branch 'origin/ootani' into sakuragi
Merge remote-tracking branch 'origin/hijikuro' into sakuragi
書籍検索機能をちょっと修正。

書籍番号での検索でヒットしない場合の処理を修正。
貸し出し/返却の日付をyyyy/mm/dd
Merge remote-tracking branch 'origin/ootani' into sakuragi
Merge remote-tracking branch 'origin/sakuragi' into hijikuro