Move core code to kaminari-core gem

lib/kaminari.rb

@@ -1,42 +1,3 @@
-module Kaminari
-end
-
-# load Rails/Railtie
-begin
-  require 'rails'
-rescue LoadError
-  #do nothing
-end
-
-$stderr.puts <<-EOC if !defined?(::Rails::Railtie) && !defined?(Sinatra) && !defined?(Grape)
-warning: no framework detected.
-
-Your Gemfile might not be configured properly.
----- e.g. ----
-Rails:
-    gem 'kaminari'
-
-Sinatra/Padrino:
-    gem 'kaminari-sinatra'
-
-Grape:
-    gem 'kaminari-grape'
-
-EOC
-
-# load Kaminari components
-require 'kaminari/config'
-require 'kaminari/exceptions'
-require 'kaminari/helpers/paginator'
-require 'kaminari/models/page_scope_methods'
-require 'kaminari/models/configuration_methods'
-require 'kaminari/hooks'
-
+require 'kaminari/core'
 require 'kaminari/actionview'
 require 'kaminari/activerecord'
-
-# if not using Railtie, call `Kaminari::Hooks.init` directly
-if defined? ::Rails::Railtie
-  require 'kaminari/railtie'
-  require 'kaminari/engine'
-end