Release 0.25.1

Updates and fixes to documentation
Change week data code so we no longer return a hash of all the data but
now take a territory id and return the data specifically for that
territory
Fixed up week data and calendar preferences to use territory containment

Added currency data to the number formatting code
Added tests for the above changes
Allow for use with Perl 5.10 and above
Fixed tests to handle Perl 5.10 and above