Cshelve

Improvement
- Interfaced with cloud provider modules.
- Added unit tests for the azure-blob provider.

Added
- Performance tests were added to the project. See [main.py](./performances/) for details.

Changed
- **Breaking Change**: The provider `azure` in the `.ini` configuration has been renamed to `azure-blob`.

Improved
- Improved the `n` flag to remove database content quicker using parallelism.

- Initial release.