Mdl=model_train(ml_data, Model_name) trains a classification model
ARGUMENTS
ml_data ... struct, struct returned with train_test_split
Model_name ... string,'BDT' --> Binary Classification Tree
'NBayes' --> Naive bayes
'knn' --> k-Nearest Neighbor Classifier
'Bsvm' --> Binary support vector machines
'Blinear' --> Binary Linear Classification
'Bkernel' --> Binary Kernel Classification
'Msvm' --> Multiclass support vector machines
'FF' --> Forward Feed Neural network
'LSTM' --> Long short-term memory
'BiLS' --> Bidirectional Long short-term memory
'CNN' --> Convolutional neural network
RETURNS
Mdl ... Trained model