add back __version__ (#20)

* add back __version__

* relative import

* add template _version file

update pypi GHAs (#18)

Merge pull request #11 from gschramm/1.5.2

1.5.2

add dicom series numbers

add command line options to specify series desc (perfix and suffix)

correct typo in README

update dockerfile and require only tenorflow-cpu by default

update install instructions II, ignore apple silicon