add new functions

[mmarzl17]

At present, the metric indicators calculated by the algorithm are all output in the log, and the indicator values ​​cannot be obtained, so I additionally calculated logloss, acc, and prec. In the calculation process, it is found that logloss needs a value of 0 to 1, and acc and prec need a label value of 0 and 1, so it is necessary to call the setSign and setSigmoid methods, but after continuous calls, it is found that these two functions do not cover the last time. value, but add a new value, so add disableSigmoid, disableSign these two methods