This module changes the default stringification behaviour of Date::Simple
objects to use the format() method instead. It also changes the
behaviour of the constructor.
Date::Simple::Fmt->new (FMT, [ARG, ...])
date_fmt (FMT, [ARG, ...])
Follows the same rules as for the equivelent method (new) and subroutine
(date) in Date::Simple except that the first argument is expected to be
the default format for the newly created object. It is this format that
will be used when using overloaded stringification or when not providing a
format argument to the format() method.