fix test_MetadataHeader_encode
fix broken error message
fix test_MetadataHeader_decode
sketchy metadata handling
fix comment about the zlib hashes
fix input translation and output of all checksums
fix checksum tests, output is packed binary
fix file_corruption tests
fix foobared integer division
rename test method for decoding BloscpackHeader
fix test_BloscPackHeader_encode
fix whitespace
fix predictability of the serializer test
write the file as binary in the test code
open the file to read for info in binary mode
fix subcommands in py3
check output in case of wrong subcommand