refs 6724 IE9だと、検索結果画面でカーソルでのフォーカス移動が出来ない。

検索フォームをクリックした場合の処理のブロック削除
refs 6552 ItemHasOperator
add date_of_dicontinuance to manifestations
Merge remote-tracking branch 'origin/master'
refs 6628 modified Bookbinding

search with identifier, date_of_publication, numbers
modified add_manifestation_exinfos, add_manifestation_extexts
add observe field for manifestation
Merge branch 'master' of github.com:MiraitSystems/enju_trunk
Merge remote-tracking branch 'origin/master' into issue6553
delete needless code