7.1.4 files

7.1.3 release

change to Poetry

merge commit

fix README images; setup.py verison acquisition

gitignores

Version 5.2.1

More debian packaging fixups.

Merged LiteralProxy removal code by @wrobell

Renamed closure.py to owlrl.py
Moved changelog to its own CHANGELOG.rst file
Fixed bdist_wheel bug that mangled shebang lines in scripts.