An Engine can include app/helpers, so let's move the helpers there

however, leaving the original module as is for now, for Sinatra compatibility...

app/helpers/kaminari_helper.rb

@@ -0,0 +1,5 @@
+require 'kaminari/helpers/action_view_extension'
+
+module KaminariHelper
+  include Kaminari::ActionViewExtension
+end

lib/kaminari.rb

@@ -26,7 +26,6 @@ EOC
 
 # load Kaminari components
 require 'kaminari/config'
-require 'kaminari/helpers/action_view_extension'
 require 'kaminari/helpers/paginator'
 require 'kaminari/models/page_scope_methods'
 require 'kaminari/models/configuration_methods'

lib/kaminari/hooks.rb

@@ -28,10 +28,6 @@ module Kaminari
         ::Plucky::Query.send :include, Kaminari::PluckyCriteriaMethods
       end
       require 'kaminari/models/array_extension'
-
-      ActiveSupport.on_load(:action_view) do
-        ::ActionView::Base.send :include, Kaminari::ActionViewExtension
-      end
     end
   end
 end