Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2009.04 No.701 Yuuri Morishita 森下悠里
	[DGC] 2009.04 No.702 Ai Kawanaka 河中あい
	[DGC] 2009.04 No.703 Saori Yoshikawa 吉川さおり
	[DGC] 2009.04 No.704 Sayaka Kato 加藤沙耶香
	[DGC] 2009.04 No.705 Kirara Asuka 明日花キララ
	[DGC] 2009.04 No.706 Kaera Uehara 上原カエラ
	[DGC] 2009.04 No.707 Yukie Morikawa 森川ゆきえ
	[DGC] 2009.04 No.708 Miyuu Tachibana 橘未憂
	[DGC] 2009.04 No.709 Yuki Ogawa 小川優稀
	[DGC] 2009.04 No.710 Rika Ando 安堂りか
	[DGC] 2009.04 No.711 Yumi 優美
	[DGC] 2009.04 No.712 Yuki Katagiri 片利優妃
	[DGC] 2009.05 No.713 Anri Sugihara 杉原杏璃
	[DGC] 2009.05 No.714 Mai Nishida 西田麻衣
	[DGC] 2009.05 No.715 Mai Ayukawa 鮎川まい
	[DGC] 2009.05 No.716 Kiyono 清乃
	[DGC] 2009.05 No.717 Hoshino Miyu ほしのみゆ
	[DGC] 2009.05 No.718 Kaho Kasumi かすみ果穂
	[DGC] 2009.05 No.719 Mai Amano あまのまい
	[DGC] 2009.05 No.720 Rioka