Prefix notification with "[GitHub]"

In making chat output more parsable, I'm starting for favour a notification format like this

    hubot>>> [Freshdesk] #449 (☆☆☆) - Ticket created. http://gittip.freshdesk.com/helpdesk/tickets/449
    hubot>>> [GitHub] New issue "Gravatar not updating" by wrought: https://github.com/gittip/www.gittip.com/issues/2392

Any objection to us taking that approach, @parkr?