Fix bugs in plane / line intersection
Fix bugs in plane / line intersection

djowatts/mathnet-spatial,cqwang/mathnet-spatial,cqwang/mathnet-spatial,csjune/mathnet-spatial,Giusy151/mathnet-spatial,csjune/mathnet-spatial,csjune/mathnet-spatial,Giusy151/mathnet-spatial,djowatts/mathnet-spatial