How to implement cardboard reticle pointer in Unity 5.6.0b7?

How can I implement the cardboard reticle pointer in Unity 5.6.0b7? Is it built-in? Should I continue importing the GoogleVRForUnity.unitypackage to achieve it?

AFAIK the Google package is your best option for now. Others on the forum may
have other suggestions.

Yep, a lot of the scripts have changed, I go through them in the first 10 mins in the video (or just check the new demo scene in /GoogleVR/HeadsetDemo). Also, we have a Mobile VR Interaction Pack with options like interaction distance and outline which replaces the need for GoogleVRForUnity.unitypackage in 5.6+ ‘native’ VR.