FIX remove confusing BaseEstimator.__str__
Replaced abbreviated 'w.r.t' to 'with regards to'
Doc fix - Compiled .pyx files with Cython 0.20
Merge pull request #2830 from eltermann/wrt-abbreviation

Replaced abbreviated 'w.r.t' to 'with regards to'
Merge pull request #2750 from jnothman/no-str

FIX remove confusing BaseEstimator.__str__
What's new: group entries by topic
Remove superfluous AdaBoostRegressor call.
Merge pull request #2852 from jwkvam/adaboost_test

Remove superfluous AdaBoostRegressor call.
MISC: better error messages in BaseLibLinear
Uniformize max_features semantics
TST add tests with constant features
Update what's news
Remove duplicate what's new
/s/2013/2014: Updated project copyright date
Merge pull request #2857 from eltermann/copyright-updated

/s/2013/2014: Updated project copyright date
Update naive_bayes.rst

Updated the Bernoulli equation for P(x_i|y) to match http://www.inf.ed.ac.uk/teaching/courses/inf2b/learnnotes/inf2b-learn-note07-2up.pdf. The equation currently displayed can't possibly be correct because it gives a 0 probability no matter what value x_i takes.
Merge pull request #2858 from ameasure/patch-1

Update naive_bayes.rst
s/svn/svm
Merge pull request #2859 from eltermann/fixed-typo

s/svn/svm
Merge pull request #2829 from arjoly/maxfeatures-seamantics

[MRG] Uniformize max_features semantics for extra trees and random forest