Bigml

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- Adding new local Pipeline object to encapsulate and run prediction
workflows.
- Changing ``api.ok`` response to return as False when retrieving faulty
resources. Previously, only problems retrieving the API response cause
``api.ok`` returning False.
- Adding FaultyResource exception to inform about that type of failure when
using the ``raise_on_error`` flag in ``api.ok``.
- Fixing bug in local LogisticRegression when predicting with operating points.

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- Adding local Dataset class to handle Flatline transformations.

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- Adding feature expansion to image fields in local predictors.

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- Adding utility to reproduce the backend images preprocess in local
deepnets.

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- Adding the new capabilities the last API release: object detection.

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- Improved webhooks hashing check.
- Adapting connection to allow API version setting, needed for compatibility
with the Predict Server syntax.