set binmode for all adapters

lib/paperclip/io_adapters/attachment_adapter.rb

@@ -49,6 +49,7 @@ module Paperclip
 
     def copy_to_tempfile(src)
       dest = Tempfile.new(src.original_filename)
+      dest.binmode
       FileUtils.cp(src.path(:original), dest.path)
       dest
     end

lib/paperclip/io_adapters/file_adapter.rb

@@ -57,6 +57,7 @@ module Paperclip
 
     def copy_to_tempfile(src)
       dest = Tempfile.new(original_filename)
+      dest.binmode
       FileUtils.cp(src.path, dest.path)
       dest
     end

lib/paperclip/io_adapters/uploaded_file_adapter.rb

@@ -51,6 +51,7 @@ module Paperclip
 
     def copy_to_tempfile(src)
       dest = Tempfile.new(original_filename)
+      dest.binmode
       FileUtils.cp(src.path, dest.path)
       dest
     end