__init__.py in tests causing problems

Fixes #1
complete messagae
Bump version
Merge branch 'release-1.0.3'
when writing zip64 header pack format must be bytes
Merge pull request #3 from longaccess/zip64pack

when writing zip64 header pack format must be bytes
Bump version 1.0.4
Merge branch 'release-1.0.4'