agenda+. FPWD for Hebrew layout docs

I've been working on filling out the following docs with information 
that was lying around in the hlreq issue list:

https://w3c.github.io/hlreq/

https://w3c.github.io/hlreq/gap-analysis/


I'd like to publish both docs as FPWDs to accompany the ones we 
published recently.  Any objections/questions?

ri