refs 6721 advanced search for Manifestation#identifier
refs 6721 periodical master use Manifestation#identifier
Merge branch 'master' of github.com:MiraitSystems/enju_trunk into issue6721
refs 6721 set Manifestation#identifier and search by Manifestation#identifier
refs 6628 issue6721をマージ
Merge branch 'issue6721' of github.com:MiraitSystems/enju_trunk into issue6628

Conflicts:
	app/helpers/application_helper.rb
refs 6628 資料番号検索追加