Issue #2455: Make RBM work with sparse input when verbose=True.
Change RBM sparse format from CSC to CSR.
Cosmetic changes.
Add issparse import.
Cosmetic changes.
Expanded docstring of the verbose parameter.
Check that verbose output is sound.
FIX: unsigned int -> UINT32_t
FIX #2372: non-shuffling StratifiedKFold implementation and updated tests
Merge pull request #2463 from ogrisel/stratified-kfold

[MRG] FIX #2372: non-shuffling StratifiedKFold implementation
FIX: skip numpy.dot + multiprocessing test that segfaults under recently updated OSX 10.8
FIX: broken doctest impacted by stratified CV and tree RNG changes combined...
Merge pull request #2457 from untom/rbm_csr_format

[MRG] Switch BernoulliRBM to CSR format
FIX: use next(iterator) built-in instead of iterator.next()