Emloop

- Fix stream_info dataset fn
- Update to new Ruamel yaml
- Packagin update

- Python API refactor
- Fix YAML loading

- Integrate deprecated `emloop-scikit` and its `ClassificationMetrics` hook (51).
- Add `Benchmark` hook (43).
- Minor fixes in config file reading (57, 39).
- Various other minor fixes and improvements.

- `on_incorrect_config=(ignore|warn|error)` can be passed to `MainLoop` config yielding either an error or a warning or ignores invalid main loop config entirely
- add [Flatten](http://emloop.org/emloop/emloop.hooks.htmlemloop.hooks.Flatten) hook which flattens various collections into a flat structure
- add [LogitsToCsv](http://emloop.org/emloop/emloop.hooks.htmlemloop.hooks.LogitsToCsv) hook which exports classification logits into CSV
- add [PlotLines](http://emloop.org/emloop/emloop.hooks.htmlemloop.hooks.PlotLines) which plotd sequences of numbers using matplotlib
- add [SaveFile](http://emloop.org/emloop/emloop.hooks.htmlemloop.hooks.SaveFile) which saves specified files into the output directory before the training
- add [SaveMasks](https://github.com/iterait/emloop/blob/dev/emloop/hooks/save_masks.py) which saves a stream of masks
- add [SequenceToCsv](http://emloop.org/emloop/emloop.hooks.htmlemloop.hooks.SequenceToCsv) which stores the specified sequences to CSV
- test refactor

Rebranding