"Uncommented missing .py file"
Merge pull request #115 from Alex-van-der-Peet/pythonTestsFix

"Uncommented missing .py file"
Fix subtracting target score with min_improv to deal with negative min_improv
Merge pull request #122 from ngeiswei/fix_target_score_bug

Fix subtracting target score with min_improv to deal with negative case