GPU Instancing Improvement
只能改进了一些功能吧，原GPU Instancing shader可参考
https://docs.unity3d.com/Manual/GPUInstancing.html
IL2CPP: Windows Runtime projections
Making IL2CPP understand Windows Runtime projections will enable C# scripts and plugins to consume Windows Runtime APIs directly on Windows Desktop, Windows Store and XBOX One platforms.
* IL2CPP作为新编译的引擎，本来只是支持IOS 64位，现在完全支持WINDOWS及其相关系统，只能说UNITY3D和MONODEVELOP的分裂又再向前了一大步吧，对于新手或者独立开发者没什么需要深入研究的，历年的UNITY3D的升级并不会太激进，各个平台的用户都不会感到升级对日常工作有很大影响，棘手的第三方问题几乎都有解决方案或者替代方案
iOS Native Crash Reporting
用了就知道,unity3d也不是完美的，经常卡死，莫名崩溃，但是重启能解决的问题就都不是问题，report什么的不重要
Lighting Modes
这个一个新的builder for lighting，可惜的是新东西总是比较难看到，要穿过很多墙才能看到根本
https://www.dropbox.com/s/1hdi5vprimxb5lg/LightingModesUserManual-preview2.pdf?dl=0
Particle System Improvements
- Multi-Edit support.
- Custom Data Module, including HDR color support.
- More flexible Custom Vertex Streams UI.
- New Burst Emission UI, with support for repeating bursts.
- Shape Module upgraded to support non-randomized behaviors (eg. looping and uniform distribution).
- Particle 2D collision optimization including a 10x performance improvement detecting collisions and improved solving of overlaps.
附下载：https://unity3d.com/cn/get-unity/download
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