Closes #8

I picked a JSend like way of output after checking online
(http://stackoverflow.com/a/14538774/1385429)

{
"status": "success",
"data": [...]
}

{
"status": "success",
"data": null
}

{
"status": "error",
"message": "...some error message......."
}

HTTPS statusses as you would expect from a RESTful webservice remain
intact.