refs 6661 master merged

Squashed commit of the following:

commit 76bd5ad57f64eb1dc493c1c66769a5177d12fce5
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 22:58:39 2014 +0900

    correct drop_table

commit 5324b4b3b655cc9aed99bdac7d31bbf794a39f5f
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 22:57:26 2014 +0900

    add index to item_exinfo

commit f23752e5179cffece5eb6cbf3912b79bee82f58f
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 21:00:58 2014 +0900

    create item_exinfos

commit 54985b538c3b89e218381159f4d6f9d99963b471
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 20:55:27 2014 +0900

    create item_exinfos

commit a42fd6a0f7ce5d6b4407b6dde75b83ec2603255f
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 14:12:45 2014 +0900

    refs 6417 make_select2 for items

commit 83f9b24bfe025f0401012e763d5bcd538a246721
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Mon Mar 3 00:06:35 2014 +0900

    refs 6471 make_select2: select master by name or display_name

commit 395f4cd68fc62817bc85cdaee84b6d47770b6652
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Sun Mar 2 17:04:42 2014 +0900

    refs 6046 Order and Payment

commit 1dcee671e1f9ff534160834bb73068203dd82d89
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Fri Feb 28 20:19:27 2014 +0900

    refs 6547 copy and new SeriesStatement

commit 6701d429bf88f5199a8fe09c7fae32bf778940d8
Author: emiko <tamiya.emiko@miraitsystems.jp>
Date:   Fri Feb 28 16:12:56 2014 +0900

    refs 6659 modified validation for abbreviation