Contributing page needs update

[gnarf]

In particular, the meeting time in the getting help section is wrong.

In addition, the jQuery Content Team holds a public, weekly meetings on Freenode, at 1PM Eastern time in the #jquery-meeting channel.

It doesn't even say what day, also it's biweekly, maybe just link to the meetings calendar? http://meetings.jquery.org/

[arthurvr]

I was waiting for #554 to be figured out, but you're true, time to give it an update. I'll do it Monday.

[arthurvr]

@gnarf I opened #631. Could you review?