Update babylon.abstractMesh.ts

Add a return to setPhysicsState in order to retrieve the physics body (and update its velocity or whatever we need).
Merge pull request #334 from Temechon/patch-17

Update babylon.abstractMesh.ts
Merge pull request #335 from simonferquel/master

Max2Babylon : support for bone based animations + leverage of the IGame* interfaces for easier exports
Finalizing bones export from 3dsmax
Fixing buffer overflow with particles and sprites
Fixing sprites dependecy to meshes
[Max2Babylon] - export crash when a skin modifier is not really a bone
Max2Babylon - fixup for unordered bone hierarchies and non-bone item in a skeleton hierarchy
Merge with core repository