- angleBetween
T angleBetween(Vector!(T, N) a, Vector!(T, N) b)
 - cross
Vector!(T, 3) cross(Vector!(T, 3) a, Vector!(T, 3) b)
 - dot
T dot(Vector!(T, N) a, Vector!(T, N) b)
 - maxByElem
Vector!(T, N) maxByElem(Vector!(T, N) a, Vector!(T, N) b)
 - minByElem
Vector!(T, N) minByElem(Vector!(T, N) a, Vector!(T, N) b)
 - reflect
Vector!(T, N) reflect(Vector!(T, N) a, Vector!(T, N) b)
 3D reflect, like the GLSL function.