add AABB subdivide impl
add GMesh tessellate impl, update area
add Sphere transformation impls, PClassify, PIntersect (ray only), PProximity, PSample, PTessellate
add Tetrahedron PVolume impl
bugfix triangle ctor fns, bugfix equilateral2, add equilateral3, update circumcircle-raw to use macromath
bugfix field name for Sphere type
minor update shared-vertex? and add comments to delaunay ns
update protocol test