This files contains shorter explanation about notebooks in ignored notebooks
1. Following notebooks are running in colab but not in our workflow
book2/08/casino_hmm
book2/11/ars_demo
book2/28/sparse_dict_demo
book2/29/hmm_gaussian_2d
book2/29/causal_impact
2. Follwing notebooks are taking more than 1200s
d2l notebooks
book2/16/lecun1989
