Ann: julian pack (date and time library)

I've released a date and time library that I've been using for a while.
 It's implemented with library(clpfd), so you can do some powerful
calculations with relative ease.  A fun little example is shown on the
project's home page: http://mndrix.github.io/julian/

In which year of Dwight Eisenhower's presidency did the Fourth of July
holiday fall on a Sunday?

?- form_time([dow(sunday), Year-07-04]), Year in 1953..1961.Year = 1954.

It also handles standard stuff like Unix epoch times, RFC3339 strings
(parsing and generating), date arithmetic, date comparison, etc.  The
project's test suite (under t/) contains some more examples.  The home page
also has a three-part tutorial.

I welcome bug reports, feedback, criticism and humorous name calling.

-- 
Michael
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