[DAS2] timezone change

[Andrew Dalke]

To make it easier for Thomas' Java library, the timezone
in the datestamps may also be of the form "0500".

Here are the valid forms and new examples

       TZD  = time zone designator (optional; one of the formats
                      "Z", +hh:mm, +hhmm, -hh:mm, or -hhmm)


    1959-21-52T09:35+0300

    2042-03-18T01:19:00-11:15


					Andrew
					dalke at dalkescientific.com