Doc typo fix thanks to Rymai

README.rdoc

@@ -109,7 +109,7 @@ a set of styles for an attachment, by default it is expected that those
 "styles" are actually "thumbnails". However, you can do more than just
 thumbnail images. By defining a subclass of Paperclip::Processor, you can
 perform any processing you want on the files that are attached. Any file in
-your Rails app's lib/paperclip_processor directory is automatically loaded by
+your Rails app's lib/paperclip_processors directory is automatically loaded by
 paperclip, allowing you to easily define custom processors. You can specify a
 processor with the :processors option to has_attached_file: