Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2015.06 No.1241 Ai Shinozaki 篠崎愛
	[DGC] 2015.06 No.1242 Rui Kiriyama 桐山瑠衣
	[DGC] 2015.06 No.1243 Yuria Satomi 里美ゆりあ
	[DGC] 2015.06 No.1244 Yuri Kijima 木嶋ゆり
	[DGC] 2015.07 No.1245 Chiyo Koma 小間千代
	[DGC] 2015.07 No.1246 Yuka Someya 染谷有香
	[DGC] 2015.07 No.1247 Yuri Shibuya 渋谷ゆり
	[DGC] 2015.07 No.1248 Yoko Kumada 熊田曜子
	[DGC] 2015.07 No.1249 Rin Aoki 青木りん
	[DGC] 2015.07 No.1250 Emiri Tachibana 立花絵海莉
	[DGC] 2015.08 No.1251 Chiaki Kyan 喜屋武ちあき
	[DGC] 2015.08 No.1252 Maho Hashimoto 橋本真帆
	[DGC] 2015.08 No.1253 Saki Yanase 柳瀬早紀
	[DGC] 2015.08 No.1254 Natsuko Tatsumi 辰巳奈都子
	[DGC] 2015.08 No.1255 Risa Kasumi かすみりさ
	[DGC] 2015.08 No.1256 Kanae Shiina 椎名香奈江
	[DGC] 2015.09 No.1257 Anri Sugihara 杉原杏璃
	[DGC] 2015.09 No.1258 Azusa Tsukahara 塚原あずさ
	[DGC] 2015.09 No.1259 Sena Ichimizu 一水せな
	[DGC] 2015.09 No.1260 Erika Tsunashima 綱島恵里香