Add NLTKClassifier wrapper class
Add NLTKClassifier wrapper class

This makes it easier to add more classifiers from nltk.classify

laugustyniak/TextBlob,beni55/TextBlob,freakynit/TextBlob,dipeshtech/TextBlob,jcalbert/TextBlob,jonmcoe/TextBlob,syllog1sm/TextBlob,sloria/TextBlob,adelq/TextBlob,syllog1sm/TextBlob,nvoron23/TextBlob,IrisSteenhout/TextBlob,syllog1sm/TextBlob,Windy-Ground/TextBlob,sargam111/python