Fixes and general progress

app/helpers/application_helper.rb

@@ -1,12 +1,12 @@
 module ApplicationHelper
-  include GrapeRouteHelpers::NamedRouteMatcher
+  include RoutingHelper
 
   def unique_tag(date, id, type)
     "tag:#{LOCAL_DOMAIN},#{date.strftime('%Y-%m-%d')}:objectId=#{id}:objectType=#{type}"
   end
 
   def subscription_url(account)
-    add_base_url_prefix subscription_path(id: account.id, format: '')
+    add_base_url_prefix subscriptions_path(id: account.id, format: '')
   end
 
   def salmon_url(account)
@@ -14,6 +14,6 @@ module ApplicationHelper
   end
 
   def add_base_url_prefix(suffix)
-    "#{root_url}api#{suffix}"
+    File.join(root_url, "api", suffix)
   end
 end