This method takes bytes as input and decompress everything to a
ByteBuffer. It uses two control codes (clear and end of data) as
described in the GIF, TIFF and PDF specifications.
Some users of the LZW algorithm use a different value to determine when
the size of the code changes. GIF increments the size when the number of
elements in the table is equal to 2^code_size while TIFF does it for a
count of 2^code_size - 1.
This patch adds the parameter m_offset_for_size_change with a default
value of 0 and our decoder will increment the code size when we reach
a table length of 2^code_size + m_offset_for_size_change. This allows us
to support both situations.
