WIP: Path and URL in storage module.

lib/paperclip/attachment.rb

@@ -274,13 +274,14 @@ module Paperclip
     end
 
     def initialize_storage #:nodoc:
-      storage_name = @storage.to_s.capitalize
+      storage_class_name = @storage.to_s.capitalize
+      storage_file_name = @storage.to_s.downcase
       begin
-        require "paperclip/storage/#{@storage}"
+        require "paperclip/storage/#{storage_file_name}"
       rescue MissingSourceFile
-        raise StorageMethodNotFound, "Cannot find the '#{@storage}' storage adapter."
+        raise StorageMethodNotFound, "Cannot load 'paperclip/storage/#{storage_file_name}'"
       end
-      @storage_module = Paperclip::Storage.const_get(storage_name)
+      @storage_module = Paperclip::Storage.const_get(storage_class_name)
       self.extend(@storage_module)
     end