Changing tweetstream to whitelisted.

[bridgetkromhout]

This changes the tweetstream to use a list (and widget) from devopsdaysMSP instead of the old search one, which got a lot of spam.

Before:

After:

An improvement would be to make a definitive list under @devopsdays. I'd like to get this merged before Vancouver starts tomorrow so that when people are going to the site all day they won't be spammed.

Since it's a front-page change, I'd like at least one other Core team member to 👍 it.

[geekle]

This is a good change. It resolves the spam issue 👍

[bridgetkromhout]

Thanks, @geekle. I'm heading to bed but unless there are objections I'll merge it in the morning.