Merge pull request #1713 from jbousquie/patch-2

Update what's new.md

dist/preview release/what's new.md

@@ -13,12 +13,13 @@
 
 ### Updates
 - `VertexBuffer.updatable` is now serialized ([deltakosh](https://github.com/deltakosh))
- - Added intersectsMeshes to Ray ([abow](https://github.com/abow))
- - New RayHelper class for easily viewing and attaching a ray to a mesh.  [Demo](http://www.babylonjs-playground.com/#ZHDBJ#34) - ([abow](https://github.com/abow))
- - `Mesh.applyDisplacementMap` now accepts uvScale and uvOffset parameter ([deltakosh](https://github.com/deltakosh))
- - Added addChild, removeChild, setParent to AbstractMesh ([abow](https://github.com/abow))
- - `Effect.getVertexShaderSource()` and `Effect.getFragmentShaderSource()` now returns the effective shader code (including evaluation of #define) ([deltakosh](https://github.com/deltakosh))
- - GroundMesh : `getHeightAtCoordinates()`, `getNormalAtCoordinates()` and `getNormalAtCoordinatesToRef()` can now work with rotated grounds ([jerome](https://github.com/jbousquie))  
+- Added intersectsMeshes to Ray ([abow](https://github.com/abow))
+- New RayHelper class for easily viewing and attaching a ray to a mesh.  [Demo](http://www.babylonjs-playground.com/#ZHDBJ#34) - ([abow](https://github.com/abow))
+- `Mesh.applyDisplacementMap` now accepts uvScale and uvOffset parameter ([deltakosh](https://github.com/deltakosh))
+- Added addChild, removeChild, setParent to AbstractMesh ([abow](https://github.com/abow))
+- `Effect.getVertexShaderSource()` and `Effect.getFragmentShaderSource()` now returns the effective shader code (including evaluation of #define) ([deltakosh](https://github.com/deltakosh))
+- GroundMesh : `getHeightAtCoordinates()`, `getNormalAtCoordinates()` and `getNormalAtCoordinatesToRef()` can now work with rotated grounds ([jerome](https://github.com/jbousquie))  
+- `GroundMesh`, `facetData` and `SolidParticleSystem` improvement in normal computations ([jerome](https://github.com/jbousquie))   
  
 ### Canvas2D