Rdfhash

Changes Made
- Added support for `--graph` argument, allowing for different in-memory Graph stores to be used. Currently supports `rdflib`, `oxrdflib` and `oxigraph`.
- Added support for randomly generated `--method` instances: `uuid1`, `uuid3`, `uuid4`
- Updated CLI to be simpler to use
- Updated README.md

[PyPi Page](https://pypi.org/project/rdfhash/)

Changes Made
- Added support for `python3.6` and above.
- Renamed package function `rdfhash` to `hash_subjects`.

[PyPi Page](https://pypi.org/project/rdfhash/)

Changes Made
- First full release. Available in CLI (`rdfhash`) and as a Python package.
- Primary command `rdfhash` for converting selected subjects to hashes of their triples.
- Subcommand `reverse` for converting hashed subjects to blank nodes.