Update what's new.md

dist/preview release/what's new.md

@@ -25,6 +25,8 @@
     - `diameter` parameter in `MeshBuilder.CreateCreateCylinder()` ([jerome](https://github.com/jbousquie))
     - `Material.dispose()` now removes disposed material from meshes ([deltakosh](https://github.com/deltakosh))
     - New `Material.getBindedMeshes()` function ([deltakosh](https://github.com/deltakosh))
+    - OimoJS Plugin now uses Quaternions exclusively and calculates body rotations correctly. [PR](https://github.com/BabylonJS/Babylon.js/pull/761) ([RaananW](https://github.com/RaananW))
+    - It is now possible to get the physics engine's body and wolrd objects using the physics engine. [PR](https://github.com/BabylonJS/Babylon.js/pull/761) ([RaananW](https://github.com/RaananW))
   - **Bug fixes**
     - Fixed a bug with clone and createInstance which was forcing the recomputation of bounding boxes ([deltakosh](https://github.com/deltakosh)) 
     - Fixed a bug with CSG when submeshes are kept ([deltakosh](https://github.com/deltakosh))