fix mutex
don't recalc - i hadn't had this correct before
clarify
bump minor
allow phrases and ngrams at the same time
allow ugly floats like .1
"faster"
ngram pairs had extra wrapping
note need to double-check how ngram keys are composed to avoid collisions
Merge branch 'ngrams-and-phrases'
bump minor
don't drop 0-valued labels, oops
extra test for whitespace in phrases
more whitespace tests
Treat nil as 0 in number feature labels
Use undigested column headers in the dictionary