Get a single branch

curl "https://api.phrase.com/v2/projects/:project_id/branches/:name" \
  -u USERNAME_OR_ACCESS_TOKEN

{
  "name": "new-branch",
  "created_at": "2015-01-28T09:52:53Z",
  "updated_at": "2015-01-28T09:52:53Z",
  "merged_at": "2015-01-28T09:52:53Z",
  "merged_by": {
    "id": "abcd1234cdef1234abcd1234cdef1234",
    "username": "joe.doe",
    "name": "Joe Doe"
  },
  "created_by": {
    "id": "abcd1234cdef1234abcd1234cdef1234",
    "username": "joe.doe",
    "name": "Joe Doe"
  },
  "state": "success"
}