Merge pull request #2217 from vene/ica_fit_transform

MRG backwards compatibility in FastICA estimator
More accurate documentation for class_count_ and feature_count_
Merge pull request #2182 from NelleV/pls_refactor_2

[MRG] Small refactoring of the PLS module.
Rename helper partial_fit function
DOC+ENH: fixes in least_angle + one vectorization
ENH: better error message on scoring
DOC: reorganize model_evaluation
MISC: address comments and test failure
DOC: address remarks by @NelleV
DOC: Address @larsman's comments
DOC: @amueller's comments
DOC FIX typo on fbeta, closes #2219
FIX on py3k, we need explicit relative imports
DOC : better doc of array shapes in fastica
Merge pull request #2175 from ogrisel/nb-partial-fit

[MRG] partial_fit for the discrete naive Bayes models
MISC : use linalg from scipy
Update mailmap
doc: hedge the use of OOB estimates
ENH : removing warnings from tests in cd linear models
Merge pull request #2194 from NicolasTr/as_float_array_copy

[MRG] as_float_array doesn't copy