fix failing doctest
FIX: doctest
EXAMPLE: add AdaBoost to plot_classifier_comparison
Merge pull request #28 from glouppe/adaboost

FIX: doctest
ENH added test, started on cross_val_score
ENH adding SomeScore objects for better (?!) grid search interface.
ENH refactor, taking @GaelVaroquaux's and @ogrisel's suggestions into account
ENH deprecated ``score_func``, introduced ``score`` parameter in GridSearchCV
TST test giving score as string in GridSearchCV
FIX rename ``score`` to ``scoring`` because of the name-clash with the ``score`` function.
FIX two score objects, adjust tests to new interface
ENH remove old interface completely from tests.
DOC fix docstring
ENH working on cross_val_score, trying to simplify unsupervised treatment.
ENH better testing of old an new interface. Still a bit to do for unsupervised grid search, though.
FIX usage of scores for unsupervised algorithms.
ENH use new api in permutation_test_score, don't use old api in testing.
ENH fbeta score working, more tests
DOC-string for AsScorer
ENH renamed ap and auc, added RecallScorrer