update doc part
update doc part

I've made a mystake on my previous commit about coordinatesMode & wrapU comments: I've forgotten to start with /** and my comments was below the code instead of above, sorry for that! (anyway, this was not visible in the classes doc)
Hersir88/Babylon.js,sebavan/Babylon.js,NicolasBuecher/Babylon.js,jbousquie/Babylon.js,Hersir88/Babylon.js,Kesshi/Babylon.js,Kesshi/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,jbousquie/Babylon.js,NicolasBuecher/Babylon.js,BabylonJS/Babylon.js,NicolasBuecher/Babylon.js,BabylonJS/Babylon.js,jbousquie/Babylon.js,Hersir88/Babylon.js,Kesshi/Babylon.js,sebavan/Babylon.js,BabylonJS/Babylon.js,RaananW/Babylon.js,RaananW/Babylon.js