igs: add versions.md

igs/versions.md

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+# IGS game version
+For identification purpose, IGS labels their product's revision using a
+[proprietary format](identifiers.md#product-identifier).
+
+### Music Gun Gun (CHN)
+* M-100CN
+
+### MuziBox (音炫疯)
+* M-102CN
+
+### Global Touch 2007 Sigma
+* M-262SAE
+
+### Gold Captain (航海小勇士)
+* M-100CN
+
+### Pirate Revenge
+* M-101US
+
+### Rock Fever 5
+* M-102CN
+
+### Speed Driver 2
+* M-207CNC
+
+### Speed Rider
+* M-100FA
+* M-109CNC
+
+### Percussion Kids / Tempo Kiddo
+* M-105CN
+* M-108CN
+
+### Percussion Master
+* M-108US
+* M-109US
+
+### Percussion Master 2008
+* M-200NC
+* M-202CN
+
+### We Dancing Online 2 Plus
+* M-202CN
+
+### 無敵風火輪
+* M-103CN
+
+### 海遊漁
+* M-103JP
+
+### IQ乐园网络版
+* M-148CNC
+
+### IQ乐园2012
+* M-100CN
+