whats new

dist/preview release/what's new.md

@@ -13,6 +13,7 @@
 - Added ability to not generate polynomials harmonics upon prefiltered texture creation ([sebavan](http://www.github.com/sebavan))
 - Added predicate function to customize the list of mesh included in the computation of bounding vectors in the ```getHierarchyBoundingVectors``` method ([sebavan](http://www.github.com/sebavan))
 - Added webVR constructor options: disable laser pointer toggle, teleportation floor meshes ([TrevorDev](https://github.com/TrevorDev))
+- Get a root mesh from an asset container, load a mesh from a file with a single string url ([TrevorDev](https://github.com/TrevorDev))
 
 ### glTF Loader