absolute value used for lengths

EuclideanDistance/DoubleExtensions.cs

			var vectors = new List<double>();
			for (int i = 0; i < pointA.Count(); i++)
			{
				vectors.Add(Math.Pow((pointA.ElementAt(i) - pointB.ElementAt(i)), 2));
				vectors.Add(Math.Pow(Math.Abs(pointA.ElementAt(i) - pointB.ElementAt(i)), 2));
			}
			// Return the sqare root of the sum of vectors.