Adding missing properties to mesh instance serialization.
Adding missing properties to mesh instance serialization.

RaananW/Babylon.js,BabylonJS/Babylon.js,Kesshi/Babylon.js,RaananW/Babylon.js,RaananW/Babylon.js,NicolasBuecher/Babylon.js,sebavan/Babylon.js,BabylonJS/Babylon.js,Kesshi/Babylon.js,sebavan/Babylon.js,NicolasBuecher/Babylon.js,Kesshi/Babylon.js,sebavan/Babylon.js,NicolasBuecher/Babylon.js,BabylonJS/Babylon.js