[TYPO] s/migh/might/
MAINT deprecate sequences of sequences support

 * add warnings
 * provide alternative binarizer, sklearn.preprocessing.MultiLabelBinarizer
 * fix documentation
FIX remove duplicates in MultiLabelBinarizer
COSMIT use MultiLabelBinarizer in LabelBinarizer during deprecation
COSMIT use mlb for MultiLabelBinarizer instances

This class had been called LabelSetsBinarizer, for which lsb was appropriate
ENH do not allocate memory for temporary array of 1s
DOC remove mention of sequence of sequences in Parameters sections
FIX don't use dict comprehension for Py 2.6
FIX No set construction shorthand in Py2.6
DOC comment on _transform interface

Also avoid stride trick
TST Validate input MultiLabelBinarizer.inverse_transform