Vector.opEquals

auto v1 = Vector2F(4.5f, 6.0f);
assert (v1 == Vector2F(4.5f, 6.0f));
assert (v1 != Vector2F(4.5f, 8.0f));
auto v2 = Vector3I(-1, -1, -1);
assert (v2 == -1);
assert (v2 != 0);