Adding date

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See pubDate definition in RSS 2.0 Specification:

All date-times in RSS conform to the Date and Time Specification of RFC 822, with the exception that the year may be expressed with two characters or four characters (four preferred).

Here are examples of valid RFC822 date-times:

<pubDate>Wed, 02 Oct 2002 08:00:00 EST</pubDate>

<pubDate>Wed, 02 Oct 2002 13:00:00 GMT</pubDate>

<pubDate>Wed, 02 Oct 2002 15:00:00 +0200</pubDate>

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DateTime::Format::RSS attempts to deal with those nasty RSS date/time strings used in fields (such as , , ) that never ever seems to be right.