memory use stat: axis shoulds say bytes
test referenceLastStepScore3Levels
move single statistics in package single
ConstraintMatchTotalBestScoreSingleStatistic
ConstraintMatchTotalBestScoreSingleStatistic: multiple score levels
ConstraintMatchTotalBestScoreSingleStatistic: fix report
DefaultSolver.setConstraintMatchEnabledPreference() for ConstraintMatchTotalBestScoreSingleStatistic
rename package to constraintmatchtotalbestscore
ConstraintMatchTotalStepScoreSingleStatistic