As of loopback v1.6.1, it's possible to get the details of the current users in the login response. Just add `?include=user` to the URL. See strongloop/loopback#161 and strongloop/loopback#163 for more details.

@sphess Could you please update the iOS SDK accordingly? I suppose the easiest way is to add a parameter to `loginWithEmail` specifying whether `user` should be included in the response. The login callback should have two parameters: `(LBAccessToken* token, LBUser* user)`.

@gmxtian the same change should be made in to Android SDK too (strongloop/loopback-android#24).