Added F1 score to accuracy statistic

AlexeyAB

2018-03-01 be9ccb7d7f4135a41910e6401fbe0c604f1a4080

 src/layer.h

@@ -243,6 +243,7 @@
    float * weight_updates_gpu;

   float * weights_gpu16;
   float * weight_updates_gpu16;

    float * biases_gpu;
    float * bias_updates_gpu;