create a handler to return a list of repository commits

[andrewsmedina]

Something like:

GET /repository/:name/commits

That returns:

[
  {
    "sha": "xpto123456",
    "title": "doing something",
    "author": {
        "name": "andrews medina",
        "email": "[email protected]"
    },
    "created_at": "2013-02-20T12:30:12-03:00"
  }
]