ANN: span v0.1.0

Ruby
#1

Span: a gem to calculate the calendar-correct difference between two dates

http://rubygems.org/gems/span

Backstory and motivation:
http://cookrn.tumblr.com/post/73241551337/ann-span-v0-1-0-and-more

I’d love feedback, code review, and/or bug reports :slight_smile:

Thanks,

Ryan