python 3 compatibility fix
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Merge pull request #2776 from DanielWeitzenfeld/master

added howaboutwe testimonial
Merge pull request #2775 from stefan-w/python-3-fix

python 3 compatibility fix
WIP: fix StratifiedShuffleSplit
BUG: StratifiedShuffleSplit not obeying n_train

StratifiedShuffleSplit was not giving the n_train and n_test requested
BUG: avoid same indices in test and train

COSMIT: better names as suggested @schwarty

Address comments by @schwarty
COSMIT