Added feature extraction

09_eeg_use_case.ipynb

data/eeg_use_case/test/subj10_series10_data.csv

data/eeg_use_case/test/subj10_series9_data.csv

data/eeg_use_case/test/subj11_series10_data.csv

data/eeg_use_case/test/subj11_series9_data.csv

data/eeg_use_case/test/subj12_series10_data.csv

data/eeg_use_case/test/subj12_series9_data.csv

data/eeg_use_case/test/subj1_series10_data.csv

data/eeg_use_case/test/subj1_series9_data.csv

data/eeg_use_case/test/subj2_series10_data.csv

data/eeg_use_case/test/subj2_series9_data.csv

data/eeg_use_case/test/subj3_series10_data.csv

data/eeg_use_case/test/subj3_series9_data.csv

data/eeg_use_case/test/subj4_series10_data.csv

data/eeg_use_case/test/subj4_series9_data.csv

data/eeg_use_case/test/subj5_series10_data.csv

data/eeg_use_case/test/subj5_series9_data.csv

data/eeg_use_case/test/subj6_series10_data.csv

data/eeg_use_case/test/subj6_series9_data.csv

data/eeg_use_case/test/subj7_series10_data.csv