Max iter param in Liblinear is now softcoded
ENH: Return n_iter_ from liblinear and print convergence warnings
TST: Added test to check ConvergenceWarning
Update plot_tree_regression.py

Import statements have been moved to the beginning of the file.
Merge pull request #3522 from ugurthemaster/patch-1

Update plot_tree_regression.py
FIX #3485: class_weight='auto' on SGDClassifier
[FIX] Exact inverse transform for whitened PCA
[TST] test whitened inverse
[ENH] components of unit length and whitening done by scaling with sqrt of explained variance
[DOC] What's new