ENH allow y to be a list in GridSearchCV, cross_val_score and train_test_split.
add test for safe_indexing, add another test for cross_val_score
Catch ConvergenceWarning in RandomizedL1
ENH improve forest testing + avoid *args
ENH improve rand_int and rand_uniform
ENH rename parameters in MockListClassifiers.
TST non-regression test for CV on text pipelines
Merge pull request #3400 from arjoly/forest-test-oob

ENH improve forest testing + avoid *args
Merge pull request #3396 from amueller/less_loud_randomized_lasso

ENH add convergence_warning option to lars_path.
Merge pull request #3397 from arjoly/tree-factor-rand

Improve random number generator helper in the tree module
Merge pull request #2694 from amueller/allow_y_lists

[MRG+1] allow y to be a list in GridSearchCV, cross_val_score and train_test_split
COSMIT pep8 fixes
TST ignore sequence of sequences DeprecationWarnings
Merge pull request #3406 from jnothman/minor

[MRG] Cosmetic improvements to test_metrics
move around examples for better structure.