removed monkey patch and tests
replace .sum with .reduce(0, :+)
add test for bayes untrain, +3% test coverage
Merge pull request #21 from Ch4s3/test_untrain
Update history to reflect merge of #21 [ci skip]
changed injects to .reduce
Merge pull request #20 from Ch4s3/fix_array_monkey_patch
Update history to reflect merge of #20 [ci skip]