The Range method is producing some unexpected results

`vec1` and `vec3` look funny to me. Is this a feature or a bug?

```csharp
double[] vec1 = Vector.Range(0d, 5d, 1d);                       // { 0, 1, 2, 3, 5 }
double[] vec2 = Vector.EnumerableRange(0d, 5d).ToArray();       // { 0, 1, 2, 3, 4 }
double[] vec3 = Vector.EnumerableRange(0d, 5d, 1d).ToArray();   // { 0, 1, 2, 3, 4, 5 }
```

Thanks,
Alex