FIX make_classification now outputs integer labels
DOC formatting (k_means)
BUG fix compute_class_weights issue in SGD

Fixes #1749.
Merge pull request #1753 from NelleV/FIX

FIX make_classification now outputs integer labels
P3K some more fixes in random places
DOC OpenBLAS is more dangerous than I thought

Solves #1659.
DOC oops, typo
FIX KFold should return the same result when indices=True and when indices=False.

TST Added a new test case test_cross_val_generator_mask_indices_same.

PEP8 Use 2 lines between functions.

ENH Move allocation of ind outside the for-loop.