getToken succeeds when token is not supplied

[lod]

calling client.token.getToken('http://localhost/') resolves with undefined values such as access_token

The expectation is that the promise should reject.

The bug is partially caused by this line
if (!url.hash && !url.query) {

where url = Url.parse(uri, true)
url.query = {}
{} == true

[jstoiko]

@lod: feel free to submit a PR