submission ID:6849, score= 0.2033455319493523
Submission 6991, error=0.1956451969054561

Merge remote-tracking branch 'origin/mod_learn_test' into manual_normalization

Conflicts:
	code/add_features_by_model.m
	code/linear_regression_with_model.m
	data/testing.out
	data/validation.out