Added 20 sets to [DGC] Collection

Previews & DDL:

	[DGC] 2006.01 No.221 Yuri Nishimura 西村有理
	[DGC] 2006.01 No.222 Emi Kaiho 海保恵美
	[DGC] 2006.01 No.223 Mai Miyashita 宮下真依
	[DGC] 2006.01 No.224 Hanayo Konno 紺野華代
	[DGC] 2006.01 No.225 Saki Yoshida 吉田早希
	[DGC] 2006.01 No.226 Reika Ogido 荻堂れいか
	[DGC] 2006.01 No.227 Chii Matsuda 松田ちい
	[DGC] 2006.01 No.228 Miho Otsuka 大塚みほ
	[DGC] 2006.02 No.229 Mami Yamasaki 山崎真実
	[DGC] 2006.02 No.230 Ami Tokito 時東あみ
	[DGC] 2006.02 No.231 Yuko Ogura 小倉優子
	[DGC] 2006.02 No.232 Yuki Terada 寺田有希
	[DGC] 2006.02 No.233 Risa Koda 倖田梨紗
	[DGC] 2006.02 No.234 Asami 亜紗美
	[DGC] 2006.02 No.235 Miku Hosono 細野美紅
	[DGC] 2006.02 No.236 Megumi Matsushima 松嶋めぐみ
	[DGC] 2006.02 No.237 Miku Hasegawa 長谷川未来
	[DGC] 2006.02 No.238 Mai Nagasawa 長澤舞
	[DGC] 2006.02 No.239 Yua Saito 齊藤夢愛
	[DGC] 2006.02 No.240 Haruka Ogura 小倉遥