FIX PY3: list and tuples cannot be compared in Python 3
Py3: fix version comparison in imputation module
DOC fixing some sphinx stuff.
DOC SGDClassifier has multiclass predict_proba
DOC minor copyedit to narratives
FIX don't use old scoring API in randomized search

Removed score_func and loss_func, which were deprecated the moment
they were introduced.
Add supported python versions to the classifiers + fixes
Merge pull request #2280 from larsmans/randomsearch-scoring

[MRG] Randomized search should use new scorer API
Merge pull request #2281 from ogrisel/improvements-to-setup-py

Add supported python versions to the classifiers + fixes
Add failing test for libsvm random state proba
FIX support random state in libsvm
DOC document changes in LIBSVM_CHANGES
DOC update docstrings to reflect libsvm random_state
Fix libsvm seed when predict_proba in tests and examples
Clarify and make libsvm random seed more consistent
Comment predict params in libsvm
more sphinx fixes
DOC reference and rename cross decomposition module
ENH: add failing test exposing bug in RandomizedPCA
FIX: only center if copy == True