Update the list of interested people when toggling the "like" button

[defaude]

Somewhat relates to #3 Right now, the list of people interested in an item does not update when the AJAXified buttons are used.

[jbob]

Currently the server replies to Ajax requests for the like/thumbs button with:

{
  "message": "success"
}

It's easy to include the updated list, e.g. like this:

{
  "message": "success",
  "interested": [
    "foo",
    "bar",
    "baz"
  ]
}

Would you be willing to implement the client side changes?

[defaude]

Sure thäng!