added data analysis and new metric
added data analysis and new metric

analysis() sums a respondent's differences from other respondents for
each question, then plots these differences vs. respondents (all the
commented out code is attempts at color coding points for each question,
address later)

SRmetric just sums up all of a respondent's differences and returns an
array of these sums

SurveyMan/SMPy,SurveyMan/SMPy