check value of bin is not None in correct HT bin
conform to pep8 and use of join()
Merge pull request #250 from elaird/sitv

Sitv
starts at implementing sigRelUnc
add nEventsIn
adding plots for w, wUnc, wErr, and associated funcs
adding effHadRelErr, effHadRelUnc, REMEMBER to change name when to SumWhadRelErr, SumWhadRelUnc
test point
https
init
adding initial signal weight study
adding all weigths histogram
setting errors to two
setting errors to two
adding wRelErr over fun of b
adding common weight variable
passing histogram names in scan
removing some hardcodes and adding needed weight funcs
adding weight variables
adding weight func