New cross-entropy losses with temperature #77
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A new loss is introduced: the SparseCategoricalCrossentropy with the temperature parameter.
A new loss is introduced: the equivalent to BinaryCrossentropy with a temperature parameter.
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This PR introduces two new cross-entropy losses based on Keras standard losses and with a settable temperature for softmax:
TauSparseCategoricalCrossentropyequivalent to KerasSparseCategoricalCrossentropyTauBinaryCrossentropyequivalent to KerasBinaryCrossentropy