Move RoutesLoadedFile into its own file.

This fixes an autoload issue, that happens if RoutesLoadedFile is
loaded/accessed before LoadedFile (resulting in uninitialized constant
error).

lib/rails_development_boost.rb

@@ -53,6 +53,7 @@ def self.supports_reload_classes_only_on_change?
   autoload :ReferenceCleanupPatch,   'rails_development_boost/reference_cleanup_patch'
   autoload :Reloader,                'rails_development_boost/reloader'
   autoload :RequiredDependency,      'rails_development_boost/required_dependency'
+  autoload :RoutesLoadedFile,        'rails_development_boost/routes_loaded_file'
   autoload :ViewHelpersPatch,        'rails_development_boost/view_helpers_patch'
 
   def self.debug!

lib/rails_development_boost/loaded_file.rb

@@ -287,28 +287,4 @@ def current_mtime
       File.mtime(@path).to_i rescue nil
     end
   end
-
-  class RoutesLoadedFile < LoadedFile
-    def decorator_like?
-      false
-    end
-
-    def changed?
-      false
-    end
-
-    def schedule_consts_for_unloading!
-      Reloader.routes_reloader.force_execute!
-    end
-
-    def add_constants(new_constants)
-    end
-
-    def clean_up_if_necessary
-    end
-
-    def self.for(file_path)
-      LOADED.loaded?(file_path) ? LOADED[file_path] : LOADED[file_path] = new(file_path)
-    end
-  end
 end

lib/rails_development_boost/routes_loaded_file.rb

@@ -0,0 +1,25 @@
+module RailsDevelopmentBoost
+  class RoutesLoadedFile < LoadedFile
+    def decorator_like?
+      false
+    end
+
+    def changed?
+      false
+    end
+
+    def schedule_consts_for_unloading!
+      Reloader.routes_reloader.force_execute!
+    end
+
+    def add_constants(new_constants)
+    end
+
+    def clean_up_if_necessary
+    end
+
+    def self.for(file_path)
+      LOADED.loaded?(file_path) ? LOADED[file_path] : LOADED[file_path] = new(file_path)
+    end
+  end
+end