Added Doctrine Mapping information to Category entity
Installed DoctrineFixturesBundle to load training data
reverting installation of DoctrineFixturesBundle in favor of a Symfony Command
Implemented Tokenizer service in UtilBundle
Also reverted setter to classic behavior for Category#probT
Implemented training step as console command

Naive bayes classifier code spread between TrainCommand and NaiveBayesCategoryBuilderProxy