Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2008.07 No.601 Yuka Kyomoto 京本有加
	[DGC] 2008.07 No.602 Mai Uzuki 卯月麻衣
	[DGC] 2008.07 No.603 Jun Kiyomi キヨミジュン
	[DGC] 2008.07 No.604 Misa Shinozaki 篠崎ミサ
	[DGC] 2008.07 No.605 Miyu Watanabe 渡辺未優
	[DGC] 2008.07 No.606 Moeko Hayashi 林萌子
	[DGC] 2008.07 No.607 Erika Yamasaki 山崎えりか
	[DGC] 2008.07 No.608 Karen Kurihara 栗原華恋
	[DGC] 2008.07 No.609 Kazune Otsuki 大槻かづね
	[DGC] 2008.08 No.610 Saaya 紗綾
	[DGC] 2008.08 No.611 Ai Shinozaki 篠崎愛
	[DGC] 2008.08 No.612 Sakura Sato 佐藤さくら
	[DGC] 2008.08 No.613 Yoshimi Hamasaki 浜崎慶美
	[DGC] 2008.08 No.614 Mei Itoya 糸矢めい
	[DGC] 2008.08 No.615 Ai Takeuchi 竹内あい
	[DGC] 2008.08 No.616 Hana Naduki 奈月はな
	[DGC] 2008.08 No.617 Konomi Aizawa 相澤このみ
	[DGC] 2008.08 No.618 Iyo Hanaki 花木衣世
	[DGC] 2008.08 No.619 Reika Suzuki 鈴木伶香
	[DGC] 2008.08 No.620 Chiaki Sakura 佐倉ちあき