Adding "--status" option to the timeline

Hi,

I like to use the default timeline display. However, sometimes I want to know the status id for an specific tweet to be able to easily retweet, reply, get its details, or favorite without stopping streaming.

With that in mind, I've added the `--status` option to the timeline command, so that when I run `t timeline -s` or `t stream timeline -s` I get a timeline like this:
```   
  @frankmt 230634608553783296
  RT @BarryOReilly: If your serious about continuous improvement you need to read "The
  Retrospective Handbook" by @patkua http://t.co/28930cNp #retrohandbook

  @dwildt 230635200672051200
  RT @marceloneves: Business analysis is not about requirements. It's about solutions.

  @trabalhosujo 230635254300418049
  David Gilmour http://t.co/42DkZzeQ
```
That has been very useful for me. I think more people might find it useful as well. It doesn't change any of the existing behavior, it just adds one more display option.

By the way, I've added spec examples for the new option. All specs are passing. It should go through Travis nicely.

Thanks!