Representation of a propertyDateTime of a cmis object
convert the given string into epoch seconds. The date string must be in ISO date format, e.g. 2011-01-18T16:05:54.951+01:00
converts a perl representation back to a format understood by cmis
Get timezone offset of the local time from GMT in seconds. Code taken from CPAN module 'Time' - "David Muir Sharnoff disclaims any copyright and puts his contribution to this module in the public domain.
Copyright 2012 Michael Daum
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://dev.perl.org/licenses/artistic.html.