before_filter :authenticate_reader, :only => [:show, :history]
before_filter :authenticate_user, :only => [:index, :new, :edit, :create, :update, :destroy]
before_filter :authenticate_artist, :only => [:index, :new, :edit, :create, :update, :destroy]
before_filter :authenticate_reader, :only => [:show, :history]
before_filter :authenticate_user, :only => [:index, :new, :edit, :create, :update, :destroy]
before_filter :authenticate_artist, :only => [:index, :new, :edit, :create, :update, :destroy]