Added GraphLassoCV changes to whatsnew.rst
[DOC] Corrected errors in clustering documentation

Some informations given in the narrative documentation about K-means
were wrong (stopping criteria, mainly).

Fixed some typos and spelling errors as well.
[DOC] fixed a typo in an warning message.
One more typo fixed
Merge pull request #2247 from pgervais/docfixes

Doc fixes
ENH consistency mse=> mean_squared_error ari => adjusted_rand_score
FIX docstring
ENH add multioutput support to KNeighborsRegressor
ENH add multioutput support to RadiusNeighborsRegressor
ENH add multioutput support for KNeighborsClassifier
ENH add multioutput support to RadiusNeighborsClassifier
DOC + example with multioutput regression face completion for knn
ENH allows make_multilabel_classification to return label indicator format
ENH TST grid search with multioutput
ENH TST random search with multioutput data
DOC gridsearch support mulioutput data
TST cross_val_score with multioutput data
DOC more information about which classifier support multilabel
DOC unveil that some estimators support multilabel classification and multioutput-multiclass classification
COSMIT