Add multicalibrator #109
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Add multicalibrator #109
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Add Multicalibrate, Algorithm 15 in Aaron Roth's notes. This provides scalar values for each data point that satisfy multivalid coverage guarantees.
As an example, in binary classification user can obtain calibrated probabilities that the target variable is 1, for each custom group of inputs - check included benchmark.
With this PR, we also refactor Batch MVP to share base class and share the same usage interface.
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