public static GrayU8 loadPGM_U8(String fileName , GrayU8 storage )
			throws IOException
	{
		return loadPGM_U8(new FileInputStream(fileName),storage);
	}
public static GrayU8 loadPGM_U8 ( String fileName , GrayU8 storage ) throws IOException { return loadPGM_U8 ( new FileInputStream ( fileName ) , storage ) ; }
Loads a PGM image from an {@link InputStream}.

@param fileName InputStream for PGM image
@param storage (Optional) Storage for output image.  Must be the width and height of the image being read.
If null a new image will be declared.
@return The read in image
@throws IOException Thrown if there is a problem reading the image