Added
- `get_deployment_status`
- `get_elastigroup_activity`
- `import_stateful_instance`
- `get_stateful_import_status`
- `delete_stateful_import`
- `deallocate_stateful_instance`
- `recycle_stateful_instance`
- `get_stateful_instances`
- `resume_stateful_instance`
- `pause_stateful_instance`
- testing for `__init__.py`