events: Add RHoK 2012 hackathon from @decause @mansam

[jwflory]

Another historical grab:

http://www.samlucidi.com/fossbox/articles/decause/random-hacks-of-kindness-global-hackathon-rochester.html

https://www.eventbrite.com/e/rhok-global-december-2012-rochester-ny-usa-tickets-4175149986#

I'm straight up history-tripping here. cc: @decause @mansam @itprofjacobs