TYPO remove mutli (did you mean Muttley?)
Turn useless line of code into descriptive comment
FIX potential overflow in _tree.safe_realloc

The multiplication with the sizeof the base type may overflow, esp.
on 32-bit machines with very large datasets, causing the function to
allocate less memory than was intended, without not raising an exception.
Quick fix on grid_scores, updating final value with len(cv)
self.grid_scores_ = scores / len(cv)
test case on rtfe grid_scores fix
MISC: avoid overridding figure in benchs
MISC: <= rather than < in tol check (KMeans)

As reported by @EdwardRaff in #3374
MAINT temporary fix to handle cython renaming in 0.15
Implementation of logistic_regression_path.

This is mostly the code from Gael's logistic_cv branch. My work is only some
minor cleanup some added tests and benchmarking.
Take into account @agramfort's comments.

Only cosmetic changes.
Some fixes for LogisticCV object
Docstring of LogisticRegressionCV
Docstring
Refactor and some bug fixing
Docstring
FIX missing import
FIX: bug in LogisticRegressionCV
Make tests deterministic
FIX: coef.shape
Just to be sure