Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2012.12 No.1061 Haruka Kohara 小原春香
	[DGC] 2012.12 No.1062 Ruri Saijou 西條るり
	[DGC] 2012.12 No.1063 Kana Yume 由愛可奈
	[DGC] 2012.12 No.1064 Emiri Okazaki 丘咲エミリ
	[DGC] 2013.01 No.1065 Dan Mitsu 壇蜜
	[DGC] 2013.01 No.1066 Mai Nishida 西田麻衣
	[DGC] 2013.01 No.1067 Sakura Satoh 佐藤さくら
	[DGC] 2013.01 No.1068 Nana Ogura 小倉奈々
	[DGC] 2013.01 No.1069 Riho Hasegawa 長谷川リホ
	[DGC] 2013.01 No.1070 Risa Mizuki 水樹りさ
	[DGC] 2013.02 No.1071 Reimi Tachibana 橘麗美
	[DGC] 2013.02 No.1072 Ayako Yamanaka 山中絢子
	[DGC] 2013.02 No.1073 Suzune Aoi 青井鈴音
	[DGC] 2013.02 No.1074 Hitomi Kitagawa 北川瞳
	[DGC] 2013.02 No.1075 Shiori Kanzaki 神咲詩織
	[DGC] 2013.02 No.1076 Kana Tsuruta 鶴田かな
	[DGC] 2013.03 No.1077 Natsuko Tatsumi 辰巳奈都子
	[DGC] 2013.03 No.1078 Tomomi Nakagawa 中川朋美
	[DGC] 2013.03 No.1079 Kaori Yui 由井香織
	[DGC] 2013.03 No.1080 Kokomi Naruse 成瀬心美