message: Update the model maker APIs in .md files.
diff: @@ -24,8 +24,11 @@ just a few lines of code. For example, here are the steps to train an image
  classification model.
  ```python
  +from tflite_model_maker import image_classifier
  +from tflite_model_maker.image_classifier import DataLoader
  +
  # Load input data specific to an on-device ML app.
  -data = ImageClassifierDataLoader.from_folder('flower_photos/')
  +data = DataLoader.from_folder('flower_photos/')
  train_data, test_data = data.split(0.9)
  # Customize the TensorFlow model.
  