Fix definition of class methods in lib/whitehall.rb
Fix definition of class methods in lib/whitehall.rb

alphagov/whitehall,hotvulcan/whitehall,ggoral/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,robinwhittleton/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,askl56/whitehall,askl56/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,hotvulcan/whitehall