Revert "Delete .gitignore"
Revert "Delete .gitignore"

This reverts commit aae2d3c5ca7f868927d40dbbc7e989a1ea31a37e.

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