fglock/DateTime-Set — pull request #3 by fgabolde (2014-08-25 09:12:53+00:00)
Title: Doc fix.

The doc says sets can be configured with `begin`/`end` "as in the DateTime::Span" constructor, but in reality it's `start`/`end` (as the Span doc actually says). Using `begin` will cause an exception when trying to build the underlying span.

Also took the opportunity to reorder start, after, end and before to make a little bit clearer which one goes with which.