Problem 2 revision with lower but before remove punctuation.
Problem 2 clean out punctuation
First crack at problem 3. New code in deleteme as scratchpad; move to term_sentiment.
Fixed formatting for problem 1
Redid problem 2 with line-by-line load to overcome ValueError: Expecting object: line 1 column 1 (char 1).

Need to use output.txt for problem 2.