查看fbx文件的version

用文本的方式打开文件，就可以看到版本了：

FBXHeaderExtension:  {
	FBXHeaderVersion: 1003
	FBXVersion: 6100
	CreationTimeStamp:  {
		Version: 1000
		Year: 2015
		Month: 08
		Day: 24
		Hour: 00
		Minute: 54
		Second: 23
		Millisecond: 0
	}
	Creator: "FBX SDK/FBX Plugins build 20070228"
	OtherFlags:  {
		FlagPLE: 0
	}
}