Change indicator and reverse sign in summary df

[kbpi314]

Make indicator and reverse sign columns more clear by replacing indicator with class name and reverse sign with yes/no

[kbpi314]

Has been addressed in recent push to master but could be more streamlined (a bit verbose currently but helps with interpretability of the output).

[kbpi314]

Currently an issue with false_corr_TN where revsign is Yes if the pvalue and rvalues were NaN to start but are assumed to be 1, 0 if data is empty. Check if statements in statistics.py