fix getnikola/nikola-site#15 -- document apply_to_(text|binary)_file
fix getnikola/nikola-site#15 -- document apply_to_(text|binary)_file

Signed-off-by: Chris Warrick <de6f931166e131a07f31c96c765aee08f061d1a5@gmail.com>

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