Hello Aras! 2017.1 beta is out but Scriptable Render Loops are not here, can you say in which beta we can expect them? Thanks!
Scriptable render loops have been there since Unity 5.6 actually, under UnityEngine.Experimental.Rendering namespace (and them being experimental; the API kept on changing quite a lot though).
I'm not sure if in current 2017.1 beta they are out of experimental namespace yet (I kinda stopped doing graphics a while ago). I'm pretty sure there is more APIs & stuff to build scriptable render loops compared to 5.6 though.
Probably best to ask on the beta mailing list (if you're there), or in the beta section on the forums.