Add show_received_date option to control output of "Received on" at bottom of message body - fixes #31

[bshannon]

No description provided.

[jkbzh]

As discussed in issue #31 , this option is not needed. There is enough markup to let you use CSS to hide the bottom "Received on" message. as follows:

hypermail -o mcss_url=foo.css

And in foo.css

#received { display: none; }

Closes Issue #31