* Added optional parameter to return a numpy array rather than a dataframe from all transformers.
1.1.1
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* Immediately return if cols is empty.
1.1.0
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* Optionally pass drop_invariant to any encoder to consistently drop columns with 0 variance from the output (based on training set data in fit()) * If None is passed as the cols param, every string column will be encoded (pandas type = object).
1.0.5
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* Changed setup.py to not explicitly force reinstalls of other packages
1.0.4
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* Bugfixes
1.0.0
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* First real usable release, includes sklearn compatible encoders.