NewReader creates a new io.ReadCloser that satisfies reads by decompressing the data read from r.

NewWriter creates a new io.WriteCloser that satisfies writes by compressing the data and writing it to w.

LSB means Least Significant Bits first, as used in the GIF file format.

MSB means Most Significant Bits first, as used in the TIFF and PDF file formats.

Order specifies the bit ordering in an LZW data stream.