Changed execution status of notebooks.

01_Welcome.ipynb

02_Introduction_to_Tensorflow.ipynb

03_Introduction_to_Tensorflow_exercises.ipynb

04_NN_regression_in_tensorflow.ipynb

05_NN_regression_in_tensorflow_exercise.ipynb

06_Regression_larger_example.ipynb

07_Preprocessing_evaluation.ipynb

09_Image_classification.ipynb

10_Image_classification_exercise.ipynb

11_Image_classification_solution.ipynb

12_CNN.ipynb

14_Transfer_learning.ipynb

15_RNNs.ipynb

16_RNN_exercise.ipynb

17_multi_GPU_horovod.ipynb

18_TF_distributed.ipynb