mozilla/rust — pull request #12331 by bjz (2014-02-16 23:13:30+00:00)
Title: Rename Bitwise::population_count to Bitwise::count_ones and add Bitwise::count_zeros

These are inspired by the [functions in the Julia standard library](http://docs.julialang.org/en/release-0.2/stdlib/base/#Base.count_ones).