0.07

- added experimental method create_recurrence()

0.06

- added experimental method add_duration()

0.05

- improved SYNOPSIS

- added 'immutability' tests

- new() will not try to clone non-DateTime parameters (such as the
  Infinity value)

0.04

- The program will die with an error message, 
  if one tries to use offset() or quantize() methods
  These methods might come back in a later version.

- new() clones its parameters.
  This means the parameters don't have to be immutable

- new() will give an error message if we try to use a scalar parameter
  instead of a DateTime

0.03

- Uses Set::Infinite as base class, instead of Date::Set::Timezone
  This means some methods just disappeared, like event() and exclude().
  RFC2445 support might come back in a later revision.

- Removed experimental Autoload code

- Added 'Changes' and 'README'

- moved POD to end of source file.

