address duscssion 2 + expose modern API
ICA vs PCA barrier free + fixed
COSMIT
TST add generic test for averaging
ENH test that most metrics work with one sample
ENH auc averaging for multilabel-indicator format
ENH add multilabel-indicator support for average_precision
TST perform testing on average precision + simplify invariance test system
ENH add scorer support for multi-label threshold scorer
TST scorer works with multi-output decision function
flake8
TST more clean up test_metrics
DOC narrative doc for averaging support of average_precision_score
FIX decision function scorer multilabel
DOC narrative doc for roc_auc_score multilabel-indicator
DOC not all functions support multilabel-sequence format
DOC wording
FIX doctests
DOC extend roc example
DOC update example of precision-recall curve