Add sample_weight support to Dummy Regressor
Use np.average instead of np.mean
COSMIT: Minor opt in pairwise_distances_argmin_min
OPT: Speed improvements by avoiding repeated calls to check_array
Merge pull request #3811 from MechCoder/fix_repeated_checking

[MRG] Fix repeated calls of check_pairwise and type casting in pairwise_distances_argmin_min
ENH Add cross_val_predict function

This function returns the cross-validated prediction for each element in
the input data (i.e., the prediction that is made when that object is in
the test set).
FIX score precision in doctest
Implements Multiclass Hinge loss
Merge pull request #3779 from arjoly/sw-dummy-regressor

[MRG+1] Add sample_weight support to Dummy Regressor
Update what's new