moved add2HeuristicNounTable() from Learner class to DataHodler class.
1) fixed a bug in getKnownTags(). 2) change Sentence to Token.
Change Sentence to Token, UnsupervisedLearningTokenizer to OpenNLPTokenizer, UnsupervisedLearningSentenceDetector to OpenNLPSentencesTokenizer. 2) overrided equals() in Token class. 3) some code clean up.
created a new package semanticMarkup.ling.learn.dataholder. moved related classes into the package.
1) added a new method resetCounts() to Learner. 2) added a new utility method getWordPOSIterator() to DataHolder.
Merge pull request #46 from dongyemeng/master

Merge lastest