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Merge pull request #234 from mathandy/update-ci Drop python 2.7 and legacy support; Update CI

update version 

version 1.6.0 

update version to 1.5.1 

update version to 1.5.0 (now that string/file-like objects are handled) 

fix issue with filenames with no directory causing error 

now scipy is installed by default 

Update tag for PyPI 

version 1.4.1