Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2006.08 No.321 Asami Tani 谷麻紗美
	[DGC] 2006.08 No.322 Honoka Sekiguchi 関口帆香
	[DGC] 2006.08 No.323 Ayako Kanki 神吉綾子
	[DGC] 2006.08 No.324 Yukiho Hirate 平手ゆきほ
	[DGC] 2006.08 No.325 Momoka Sawada 佐和田百香
	[DGC] 2006.09 No.326 Yukie Kawamura 川村ゆきえ
	[DGC] 2006.09 No.327 Hiroko Sato 佐藤寛子
	[DGC] 2006.09 No.328 Maomi Yuuki 優木まおみ
	[DGC] 2006.09 No.329 Kazusa Sato 佐藤和沙
	[DGC] 2006.09 No.330 Atsuko Yamaguchi 山口敦子
	[DGC] 2006.09 No.331 Yurika Ito 伊藤ゆり香
	[DGC] 2006.09 No.332 Mimi Kousaka 向坂美々
	[DGC] 2006.09 No.333 Anri Suzuki 鈴木杏里
	[DGC] 2006.09 No.334 Miyu Fujisaki 藤咲みゆ
	[DGC] 2006.09 No.335 Sayaka Nagashima 永島さや佳
	[DGC] 2006.09 No.336 Hikari Yamaguchi 山口ひかり
	[DGC] 2006.09 No.337 Hitomi Oda 小田ひとみ
	[DGC] 2006.09 No.338 Asami 亜沙美
	[DGC] 2006.09 No.339 Kana Uchiyama
	[DGC] 2006.10 No.340 Jun Natsukawa 夏川純