Document the "post-list" reST extension
Document the "post-list" reST extension

Add some information to the Nikola Handbook about the "post-list"
reST extension.

TyberiusPrime/nikola,getnikola/nikola,x1101/nikola,xuhdev/nikola,wcmckee/nikola,yamila-moreno/nikola,lucacerone/nikola,techdragon/nikola,atiro/nikola,gwax/nikola,okin/nikola,berezovskyi/nikola,TyberiusPrime/nikola,andredias/nikola,JohnTroony/nikola,yamila-moreno/nikola,s2hc-johan/nikola,techdragon/nikola,immanetize/nikola,JohnTroony/nikola,jjconti/nikola,okin/nikola,wcmckee/nikola,andredias/nikola,immanetize/nikola,knowsuchagency/nikola,masayuko/nikola,pluser/nikola,x1101/nikola,jjconti/nikola,okin/nikola,andredias/nikola,xuhdev/nikola,schettino72/nikola,getnikola/nikola,lucacerone/nikola,TyberiusPrime/nikola,knowsuchagency/nikola,masayuko/nikola,xuhdev/nikola,yamila-moreno/nikola,s2hc-johan/nikola,pluser/nikola,JohnTroony/nikola,lucacerone/nikola,okin/nikola,immanetize/nikola,atiro/nikola,schettino72/nikola,xuhdev/nikola,wcmckee/nikola,schettino72/nikola,x1101/nikola,berezovskyi/nikola,berezovskyi/nikola,getnikola/nikola,jjconti/nikola,techdragon/nikola,gwax/nikola,knowsuchagency/nikola,gwax/nikola,pluser/nikola,s2hc-johan/nikola,atiro/nikola,masayuko/nikola,getnikola/nikola