merged the master repo

benchmarks/bench_plot_svd.py

doc/about.rst

doc/datasets/twenty_newsgroups.rst

doc/developers/index.rst

doc/developers/performance.rst

doc/developers/utilities.rst

doc/install.rst

doc/modules/cross_validation.rst

doc/modules/dp-derivation.rst

doc/modules/ensemble.rst

doc/modules/feature_selection.rst

doc/modules/preprocessing.rst

doc/themes/scikit-learn/layout.html

doc/themes/scikit-learn/static/nature.css_t

doc/tutorial.rst

doc/whats_new.rst

examples/applications/wikipedia_principal_eigenvector.py

examples/covariance/plot_outlier_detection.py

examples/ensemble/plot_forest_importances.py

examples/ensemble/plot_forest_importances_faces.py