…n of the API
…the use of c3dl.Plane for the shape Plane.
…to make use of it.
…han 90 degrees away from the original picking ray. Updated getAngleBetweenVectors in vector.js to accomodate for minor errors introduced by floating point calculations. Added a test (backbearing) to ensure that the back-bearing of the ray (ray rotated by 180 degrees) is ignored.
…, fixed minor bugs