Create a handler to return a list of repository branches

[scorphus]

Something like:

GET /repository/:name/branches

That returns:

[
  {
    "name": "much_wow",
    "ref": "a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9",
    "title": "Do something",
    "committer": {
        "name": "Dog Doge",
        "email": "dog.doge@gmail.com"
    },
    "author": {
        "name": "Doge Dog",
        "email": "doge.dog@gmail.com"
    },
    "created_at": "2014-07-23T15:25:35-03:00"
  },
  {
    "name": "bark_bite",
    "ref": "a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9",
    "title": "Do some other thing",
    "committer": {
        "name": "Doge Dog",
        "email": "doge.dog@gmail.com"
    },
    "author": {
        "name": "Dog Doge",
        "email": "dog.doge@gmail.com"
    },
    "created_at": "2014-07-23T15:41:35-03:00"
  },
  ...
]