Fix the encoding of CRC16
Generate CRC16 checksum using the current buffer.
Fix a bug
Remove the 'CRC16' argument from GzipInfo.__init__()
Clean up the 'GzipInfo.__repr__()' method
Set CRC32/ISIZE property during the initialization
Add docstrings
Add 'set_crc16' method to the GzipInfo class.
Add an interface to set CRC16 checksum to the archive header.
Implement the validity check of the header bytes.
Remove an irrelevant parameter
Add a test case for CRC16
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