unity3d: Asset Store 下载的package寄放位置
unity3d: Asset Store 下载的package存放位置Windows 8，C:\Users\username\AppData\Roaming\Unity\Asset
unity3d: Asset Store 下载的package存放位置
Windows 8，C:\Users\<username>\AppData\Roaming\Unity\Asset StoreMac OS X，~/Library/Unity/Asset Store
