TST small improvement of test for sample weight in svm
BUG: fix kde tests
DOC add missing links to the scorer and classication section
TST better testing of the PLS module

Now checks it returns the correct number of components, and not just the
maximum number of components.
FIX PLSSVD now returns the correct number of components

closes #1312
COSMIT small documentation tweaks
Add pycharm files in .gitignore
cosmit typo
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