Merge branch 'sgd-rename'

benchmarks/bench_sgd_covertype.py

doc/modules/classes.rst

doc/modules/linear_model.rst

doc/modules/sgd.rst

examples/document_classification_20newsgroups.py

examples/grid_search_text_feature_extraction.py

examples/linear_model/plot_sgd_iris.py

examples/linear_model/plot_sgd_loss_functions.py

examples/linear_model/plot_sgd_ols.py

examples/linear_model/plot_sgd_penalties.py

examples/linear_model/plot_sgd_separating_hyperplane.py

examples/linear_model/plot_sgd_weighted_classes.py

examples/mlcomp_sparse_document_classification.py

examples/plot_species_distribution_modeling.py

examples/sgd/README.txt

scikits/learn/__init__.py

scikits/learn/linear_model/__init__.py

scikits/learn/linear_model/base.py

scikits/learn/linear_model/setup.py

scikits/learn/linear_model/sgd_fast.c