ENH added ``classes`` parameter to LabelBinarizer
ENH added "multilabel" option to LabelBinarizer
TST Added tests for classes and multilabel options for LabelBinarizer
TST added test for ignoring additional labels during fit, improved error message.
DOC added multilabel parameter to docstring.

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FIX minor fixes for rename of multi_label to multi_label_.
FIX doctest
ENH add "indicator_matrix" parameter to LabelBinarizer, add test.
FIX doctest
TST improve coverage
FIX more doc tests
MISC replace two boolean parameters by a single string parameter.
ENH do it with strings.
FIX add deprecated properties
FIX don't deprecate multilabel_, better deprecation message for indicator_matrix_