app.nlp.ner: name change from StackedNER to StackedChainNerTrainer in HyperparameterOptimizer
util: removed stray hyphen in sh/log files generated by HyperparameterSearcher
app.nlp.parse: fixed behavior in TransitionBasedParserTrainer when user passes both single file and whole-directory train/test data (now uses all of it)