I can create the source for unite!

Hi, @nhmood !

I created [unite](https://github.com/Shougo/unite.vim) source for watson as following

[Demo](http://gifzo.net/7rIrvZwusc)

If watson outputed result as json, I can do this.
Please implement outputter as json like following :))))

Or, should I implement outputter?

```json
{
  "result" : [
    {
      "path" : "lib/watson/version.rb",
      "line" : "36",
      "comment" : "Don"t use DEBUG inside Remote class but pull from calling method"s class?",
      "tag" : "review",
    },
    {
      "path" : "lib/watson/version.rb",
      "line" : "37",
      "comment" : "Not sure if this is the best/proper way to do things but it works...",
      "tag" : "review",
    },
    ...
  ]
}
```