Time, relatively speaking in Site Updates

I was going to add time zones as a settings feature, but then decided that relative time is more interesting anyway. So instead of August 15, 2013 6:32PM, you get: 2 minutes ago

Then time zones become irrelevant as they are on most modern social networking services. And it's nice to see how long ago things were updated. I'll probably migrate all of the Prosebox timestamps to this.

I also swapped the Latest Entries column into the middle on the main page. Then when things collapse on a phone display, you scroll to the latest entries more quickly.