moved light matrix calculations from updateWorldMatrix() to getWorldToLightMatrix()
moved light matrix calculations from updateWorldMatrix() to getWorldToLightMatrix()

Signed-off-by: Patrick Keller <ca89c029562b679f2f19034e5986d10098f44329@hotmail.com>

CCLDESTY/xml3d.js,ariyapour/xml3d.js,xml3d/xml3d.js,xml3d/xml3d.js,Fiware/webui.Xml3d.js,ariyapour/xml3d.js,Fiware/webui.Xml3d.js,CCLDESTY/xml3d.js