Properly format pecan get_all() requests

For example, /v1/members will now return:

[
  {
    "id": 1,
    "created_at": "2011-04-22T13:33:48Z",
    "name": "John Smith",
    "password": "3a528267660d23d7cbf35388c6e21e6b",
    "updated_at": "2011-04-22T13:33:48Z",
  }
]

Change-Id: I8fe13a38e9f137bec250b7d24e88dad758aae08f
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>