Checks a set of points that have been transformed to sample points on an image against /// the image's dimensions to see if the point are even within the image.
/// ///This method will actually "nudge" the endpoints back onto the image if they are found to be /// barely (less than 1 pixel) off the image. This accounts for imperfect detection of finder /// patterns in an image where the QR Code runs all the way to the image border.
/// ///For efficiency, the method will check points from either end of the line until one is found /// to be within the image. Because the set of points are assumed to be linear, this is valid.
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