ENH: Return attribute n_iter_ for linear models dependent on the enet solver
TST: Added test to check that warm model converges faster than a cold one
TST: Better to test that warm_start runs only once after the prev model has converged
TST: Added test to check that higher alpha converges faster
Added return_n_iter parameter for enet (and lasso) path
MAINT temporary fix to handle cython renaming in 0.15
MAINT 32 bit unstable tests are unstable on all OSs
[DOC] minor fixes
MAINT typo in Makefile
FIX: Fit the data in tests
Merge pull request #3349 from MechCoder/return_niter

[MRG+1] Return attribute n_iter_ for linear models dependent on the enet solver
BUG: Support array interface
Catch ConvergenceWarning in RandomizedL1
ENH improve forest testing + avoid *args
ENH improve rand_int and rand_uniform
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
BUG: Support array interface
ENH: enable y to only implement the array interface

For instance y could be a pandas' dataframe