fix converting an array with ndim > 0 to an index DeprecationWarning
using floor division in python3
handle the case when length of sign changed coefficients is greater than 1 in LARS algorithm
Merge remote-tracking branch 'upstream/master' into fix-DeprecationWarning
handle the case where length of idx in least_angle greater than one
DOC logistic regression attribute docs + authorship
COSMIT fix PEP8 errors
DOC up the sales pitch for SGD
MAINT: Fix PEP8 warnings in sklearn/covariance

Ran autopep8 on all .py files
DOC fix roc_curve docstring.

tpr description had a "false" leftover from
fpr description copy-paste.
COSMIT pep8 + full stop police

metrics/tests/test_score_objects.py made stricter by replacing . with \.
in regular expressions.
Merge pull request #2797 from cli248/fix-DeprecationWarning

Fix deprecation warning in Python 3