Merge branch 'master' of https://github.com/BabylonJS/Babylon.js

dist/preview release/what's new.md

@@ -25,6 +25,7 @@
    ([carloslanderas](https://github.com/carloslanderas))
 - `AssetsManager` will now clear its `tasks` list from all successfully loaded tasks ([deltakosh](https://github.com/deltakosh))
 - Added documentation to WebVRCamera and VRExperienceHelper ([trevordev](https://github.com/trevordev))
+- Introduced `isStroke` on `HighlightLayerOptions` which makes the highlight solid ([PixelsCommander](https://github.com/pixelscommander))
 
 ## Bug fixes