verboseoptions was added to control message logs. Defaults to
textfeatures()now exports the word vector model by default
newdataargument to allow feature extraction using previously defined word vector dimensions.
textfeatures()now returns word2vec dimension estimates
word2vec_dimsarguments allow users to customize (and speed up) feature extraction process
normalizeargument, which by default preprocesses feature values
scale_*functions more robust
textfeatures()method only without the substantive analysis (sentiment)