BUG: set random state in LogisticRegression
DOC clarification in Scoring objects: Its not a good sign if I don't understand my own wording.
FIX bug in f_score with beta !=1
FIX formula inversion for sample-based precision/recall
FIX set same default behavior for precision, recall and f-score
ENH support multilabel targets in LabelEncoder

Also, support 1d-array of sequences as a multilabel format
Simplify precision_recall_fscore_support

Also, deprecate pos_label in favour of neg_label
Avoid floats for counts
More robust template
TST Use assert_almost_equal in test_symmetry
Fix unusual cases for tests
Ravel in checking arrays
Add comments
Support labels argument
COSMIT prefer partial over lambda in test_metrics
TSTFIX use name, not metric, in test_metrics error messages

Also, fix error messages without spaces
Ensure non-positive label indicators are 0 before summing
Add todo for a warning
Use list comprehensions instead of vectorize
Warn on setting 0-denominator metrics to 0