Update babylon.particleSystem.ts
Update babylon.particleSystem.ts

Added a custom update function called for each particle (cf thread http://www.html5gamedevs.com/topic/11278-controlling-particles/)
Hersir88/Babylon.js,NicolasBuecher/Babylon.js,jbousquie/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,Kesshi/Babylon.js,Hersir88/Babylon.js,BabylonJS/Babylon.js,Temechon/Babylon.js,Temechon/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js,jbousquie/Babylon.js,RaananW/Babylon.js,Temechon/Babylon.js,Kesshi/Babylon.js,jbousquie/Babylon.js,Kesshi/Babylon.js,BabylonJS/Babylon.js,abow/Babylon.js,abow/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js,sebavan/Babylon.js,Hersir88/Babylon.js,abow/Babylon.js,sebavan/Babylon.js