*   Add `auc_with_confidence_intervals`, a method for computing the AUC and
        confidence interval with linearithmic time complexity.
    *   `regression_head` now accepts customized link function, to satisfy the
        usage that user can define their own link function if the
        `array_ops.identity` does not meet the requirement.
    *   Fix `initialized_value` and `initial_value` behaviors for

code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:

   a) Give prominent notice with each copy of the object code that the