add link to mailing list

we need a mailing list link.  unless you just happen to put "oceania" in the query, our list is dead to google.
"Ruby or rails" sounds sooo rough. Lets just call it mailing list. \o/
Updated layout to include a link to the videos channel page on Vimeo.
Updating Melbourne page with latest organisers, sponsors.
Merge pull request #16 from rubyaustralia/tjmcewan/patch-1

Added link to mailing list
Merge pull request #18 from snapper/master

Added a link to channels page on Vimeo
Rebuilt.
Mentioning Melbourne hack nights.