hpoydar/chronic_duration — pull request #20 by leosoto (2013-01-06 18:51:18+00:00)
Title: Allow users to specify the duration units they want to parse/output (example: time tracker apps do not care about anything bigger than hours)

Now callers can use ChronicDuration.use_units to specify the units
they care about. Useful for example for time tracking apps which
do not care about any unit bigger than hours