mbBuildingsFromParcel Nurbs

This Generator uses Nurbs Input that have s and t coordinates. They work with the mbParcelFromSurface Nurbs based outputs. To test 2 lines can be skinned into a Nurbs surface. A @zscale primitive attribute will control the height. use attribute randomize sop or vop to setup. if no zscale is present the network will fail to cook. make sure the zscale is higher our at least double the size of the window heights, otherwise the network might fail to cook.