LImit fastFT posts to those that happened today, and fix stream bug

Fixes bug with stream where cards get collapsed into a video card
Only get fastFT posts from today - since it's supposed to be breaking news, and we're currently get a bunch of fastFT articles at the bottom of a stream.
It's just the current day - minus 24 hours i guess makes a bit more sense, but then at 11:59pm on 04/11/14 you'd get articles from the last 48 hours.

But I suppose more is better than less, and actually 48 hours isn't too bad.