move reloader to custom extensions

sinatra-contrib/lib/sinatra/contrib.rb

@@ -7,7 +7,6 @@ module Sinatra
     # or breaks if external dependencies are missing. Will extend
     # Sinatra::Application by default.
     module Common
-      register :Reloader
       register :ConfigFile
       register :Namespace
       register :RespondWith
@@ -23,6 +22,7 @@ module Sinatra
     module Custom
       # register :Compass
       register :Decompile
+      register :Reloader
     end
 
     ##

sinatra-contrib/lib/sinatra/reloader.rb

@@ -1,3 +1,5 @@
+require 'sinatra/base'
+
 module Sinatra
   # Extension to reload modified files.  In the development
   # environment, it will automatically require files defining routes