BUG: remove installation issue with compat folder

IMPR: move six to dependencies

Bugfix in levenshtein algorithms

Improve importing workflow + dist bug fix

Fix serious bug: dataframes swapped in comparing step

Improve deployment workflow

Merge pull request J535D165#24 from J535D165/index-names

Index names

Add changelog for version 0.4

Fix problems with installing with pip

Version 0.3