Merge branch 'master' of github.com:scikit-learn/scikit-learn

examples/glm/plot_lasso_lars.py

scikits/learn/benchmarks/bench_lasso.py

scikits/learn/glm/lars.py

scikits/learn/glm/setup.py

scikits/learn/glm/tests/test_bayes.py

scikits/learn/glm/tests/test_lars.py

scikits/learn/preprocessing.py

scikits/learn/setup.py

scikits/learn/tests/test_preprocessing.py

scikits/learn/utils/arrayfuncs.c

scikits/learn/utils/arrayfuncs.pyx

scikits/learn/utils/setup.py

scikits/learn/utils/src/cholesky_delete.c