[PIO-50] Update a couple templates
[PIO-50] Update a couple templates

* Sentiment Analysis - Bag of words model
* Topic labelling with Wikipedia

Closes #334

himanshudhami/PredictionIO,shimamoto/incubator-predictionio,shimamoto/incubator-predictionio,takezoe/incubator-predictionio,himanshudhami/PredictionIO,marevol/incubator-predictionio,dszeto/incubator-predictionio,shimamoto/incubator-predictionio,dszeto/incubator-predictionio,mars/incubator-predictionio,marevol/incubator-predictionio,dszeto/incubator-predictionio,takezoe/incubator-predictionio,dszeto/incubator-predictionio,marevol/incubator-predictionio,PredictionIO/PredictionIO,mars/incubator-predictionio,takezoe/incubator-predictionio,shimamoto/incubator-predictionio,mars/incubator-predictionio,himanshudhami/PredictionIO,himanshudhami/PredictionIO,PredictionIO/PredictionIO,PredictionIO/PredictionIO,mars/incubator-predictionio,takezoe/incubator-predictionio,marevol/incubator-predictionio