Changes in workflow configuration handling
Changes in workflow configuration handling

- 'path' argument is required again
- 'config' can be user-supplied
- 'config' can be auto-loaded from $project_path/config.yml
- otherwise, default configuration will be used

miloh/spreads,adongy/spreads,gareth8118/spreads,DIYBookScanner/spreads,adongy/spreads,jbaiter/spreads,nafraf/spreads,gareth8118/spreads,jbaiter/spreads,DIYBookScanner/spreads,adongy/spreads,jbaiter/spreads,nafraf/spreads,miloh/spreads,DIYBookScanner/spreads,miloh/spreads,nafraf/spreads,gareth8118/spreads