Minor changes , mainly added comments

Dataset_tools/Rename_vgg_face_dataset.py

Dataset_tools/Split_celeba_in_folders.py

Dataset_tools/crop_celeba.py

Dataset_tools/crop_vggface.py

Siamese_model.py

face_image_quality/face_image_quality.py

functions.py

requirements.txt

test_model/capture_image.py

test_model/convert_tf_lite.py

test_model/test_model.py

test_model/use_model.py

test_model/use_tflite.py

train_model_tripletloss.py