Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2010.05 No.841 Yui Kawai 可愛ゆい
	[DGC] 2010.06 No.842 Asami Tani 谷麻紗美
	[DGC] 2010.06 No.843 KONAN
	[DGC] 2010.06 No.844 Mai Narumi 成海舞
	[DGC] 2010.06 No.845 Aino Kishi 希志あいの
	[DGC] 2010.06 No.846 Asami Ogawa 小川あさ美
	[DGC] 2010.06 No.847 Miyuki Yokoyama 横山美雪
	[DGC] 2010.06 No.848 Miku Aoi 葵美紅
	[DGC] 2010.06 No.849 Ruika Motojima 本島ルイカ
	[DGC] 2010.06 No.850 Ayumi Hoshimura 星村鮎美
	[DGC] 2010.07 No.851 Anri Sugihara 杉原杏璃
	[DGC] 2010.07 No.852 Rika Kawamura 川村りか
	[DGC] 2010.07 No.853 Rion Sakamoto 坂本りおん
	[DGC] 2010.07 No.854 Miku Ohashi 大橋未久
	[DGC] 2010.07 No.855 Rin Sakuragi 桜木凛
	[DGC] 2010.07 No.856 Kaera Uehara 上原カエラ
	[DGC] 2010.07 No.857 Haruka Tachibana 立花陽香
	[DGC] 2010.07 No.858 Asami Kawakami 川上朝海
	[DGC] 2010.07 No.859 Sora Koizumi 小泉そら
	[DGC] 2010.08 No.860 Marie Kai 甲斐まり恵