Added
- Added feature to create an "open" batch.
- To create an open batch, set the `complete` argument to `True` in the `create_batch` method of the SDK.
- To add jobs to an open batch, use the `add_jobs` method.
- Updated documentation to add examples to create open batches.
- The `wait` argument now waits for all the jobs to be terminated instead of waiting for the batch to be terminated.