Add two new styles to HTML doc pages.
Fix division by zero in Line::ClosestPointLineLine. Add tests.
Micro-optimize float2::PerpDot.
Make Plane::IntersectLinePlane harsher by removing an epsilon. This improves numerical stability in TriangleTriangleIntersect test. Improve numerical precision in Triangle-Triangle intersection by performing the test in 2D if the two triangles are coplanar.