StreamingDataset and MutableDataset have now deprecated warning messa…

[mathiasbc]

…ges. They still exists but their behaviour is directly inherited from the Dataset class, which makes them identical at this point

[jamesrkg]

How does the scrunch.dataset.LOG work? We also use a logger but the deprecation warning is not coming up. It might be better to raise a DeprecationWarning in a simpler way to ensure its visible to all users, in addition to sending it to your logger.

[jamesrkg]

I think Dataset would benefit from:

@property
def streaming(self):
    return self.resource.body.get('streaming', 'no')