Add feature toggle helper, allow hash or string queries

app/helpers/application_helper.rb

@@ -1,6 +1,9 @@
 module ApplicationHelper
   include FoundationRailsHelper::FlashHelper
 
+  def feature?(feature)
+    OpenFoodNetwork::FeatureToggle.enabled? feature
+  end
 
   def ng_form_for(name, *args, &block)
     options = args.extract_options!

lib/open_food_network/feature_toggle.rb

@@ -1,7 +1,7 @@
 module OpenFoodNetwork
   class FeatureToggle
     def self.enabled? feature
-      features[feature]
+      features.with_indifferent_access[feature]
     end
 
     private