Seamm-datastore

A formatting change in an Alembic file made in the last release caused an error when installing the module.

- Protected against corrupt job_data.json files.
- Fixed format to black's new standards
- Replaced python setup.py since it is becoming obsolete
- Removed obsolete calls in version.py

This release removes the `path` field from the Flowchart table and adds alembic for performing database upgrades. This functionality has been added to the seamm installer, so it will not be necessary to manually upgrade your database.

This release adds the parameters argument to functions in database building and datastore importing. A bug is also fixed in job commit which previously allowed a flowchart with the same ID to be added multiple times.

This release fixes some bugs which were present in the last release.
- Fixes an error on re-importing jobs
- Fixes an error on updating entries with time stamps
- Fixes error on job and project update which updated whole table instead of single entry.
- Fixes query order on get method for jobs and projects.
- Cascades deletion for permissions association tables so that users can be removed from datastore.