Added POS tagging with unit test
Added TextBlob to the required packages
Merge branch 'feature_19' into dev
Merge branch 'dev' of https://github.com/rigatoni/linguine-python into dev

Conflicts:
	requirements.txt
Merging operation changes with folder restructuring.
minor fix to the input tfidf takes in. Added capitalization removal in two forms - greedy and context-aware (doesn't lower case Proper Nouns)
Merge branch 'feature_33' into dev
merge dev into feature/api