一直都用vs2010，看到要求说 VS2012+ .然后我去下载个最新的VS2015，结果编译不过。有很多宏定义重复。
Build Requirements
- Mac OS X 10.7+, Xcode 5.1+
- or Ubuntu 12.10+, CMake 2.6+
- or Windows 7+, VS 2012+
- Python 2.7.5
- NDK r10c+ is required to build Android games
- Windows Phone/Store 8.0 VS 2012+
- Windows Phone/Store 8.1 VS 2013 Update 3+