fix pycharm file ending
Imp splitting of preprocessing.py
Imp splitting of test_preprocessing.py
Del unused imports in preprocessing + pep8
Fix imports
Imp move OneHotEncoder to preprocessing/data.py
pyflakes and pep8
MAINT: update copy_joblib script
ENH: update joblib to 0.7.1

2013-07-25
Gael Varoquaux

    MISC: capture meaningless argument (n_jobs=0) in Parallel

2013-07-09
Lars Buitinck

    ENH Handles tuples, sets and Python 3's dict_keys type the same as
    lists. in pre_dispatch

2013-05-23
Martin Luessi

    ENH: fix function caching for IPython
MAINT: misc change to copy_joblib

So that we are sure that .py files are not executables (if they are, the
tests are not run)
ENH add "make_y_1d" to utils, use it in estimators where needed.
fix make ``make_y_1d`` save for lists.
use column_or_1d, move it to utils
Fix self.statistics_ souldn't be set if axis==1
FIX inline rand_r to fix build on Windows

XXX Why does building a DLL from two source files fail?
DOC add an extremely simple classifier code example to dev docs
DOC ignoring gen_rst's parsing errors

closes #1759
Fix use of self
Merge pull request #2262 from NicolasTr/fix_statistics

Imputer: self.statistics_ souldn't be set if axis==1
ENH added multiclass_log_loss metric