README not consistent with actual output

[rprieto]

The README mentions:

var timeago = require('timeago');
var pretty = timeago(+new Date());
console.log(pretty); // just now

From what I tried:

• timeago(+new Date()) : undefined, because +new Date() returns a timestamp which is not supported
• timeago(new Date()) : less than a minute ago (not "just now")

I like the README version better, could we:

• merge the pending PR that supports timestamps
• add support for "just now"

Thanks!