PY3: b() convenience function from six to fix string literal
PY3: b() convenience function from six to fix 3 string literals
fixing StringIO import by six.moves.cStringIO replacement
PY3: reindent the test_mldata.py file
Merge branch 'py3' of https://github.com/sdegryze/scikit-learn into py3
PY3: fix for string literals in datasets' test_base.py
Merge branch 'py3' of https://github.com/ogrisel/scikit-learn into py3
Merge branch 'py3' of https://github.com/raulgarreta/scikit-learn into py3
PY3: print function in coordinate descent doctest
Merge branch 'py3' of https://github.com/ogrisel/scikit-learn into py3
PY3: used six.moves.xrange to fix xrange in module test_grid_search.py