DynamicNeuralNetwork:前馈ANN的动态实现，允许进行各种超参数调整

动态神经网络 动态神经网络，它接收输入文件数据集并允许用户确定下面列出的超级参数 与Perceptron类一起使用反向传播从数据集中学习 / * ------------------------------------------------ -- DYNAMIC HYPER-PARAMETERS (THROUGH USER INPUT): 1) # of inputs 2) # of outputs 3) # of nodes in first hidden layer 4) # of nodes in second hidden layer 5) # of nodes in the output layer 6) (implicit) changing of learning rate in Perceptron class along with