bigmlcom/histogram — pull request #43 by ashenfad (2013-03-12 22:05:30+00:00)
Title: A few bug fixes

This PR bumps the version to `3.2.1` and includes a few relatively minor bug fixes (and associated tests):
- `bin-insert!` now correctly updates a histogram's min/max.
- `total-target-sum` returns nil for empty histograms.
- `sum` is now correct when a histogram's min value and the first bin's mean are the same.