old_contents: from directcost import BayesMinimumRiskClassifier
  <<<<<<< a95b5a786d5e264bc31c0f40d2ac57a10fbc368b
  from cost_tree import CostSensitiveDecisionTreeClassifier
  
  
  =======
  from regression import CostSensitiveLogisticRegression
  >>>>>>> 5ee05ff9be567d7e0d4624cb15e29aeee509f765
  
new_contents: from directcost import BayesMinimumRiskClassifier
  from cost_tree import CostSensitiveDecisionTreeClassifier
  from regression import CostSensitiveLogisticRegression
  
subject: fix merge