fixed set_attachment_attr

works with CouchDB 0.10.0

* use "content_type" instead of "content-type"
* do not encode attachment

Signed-off-by: Marcos Tapajós <tapajos@gmail.com>

lib/couchrest/mixins/extended_attachments.rb

@@ -65,10 +65,10 @@ module CouchRest
           content_type = args[:content_type] ? args[:content_type] : get_mime_type(args[:file])
           self['_attachments'][args[:name]] = {
             'content_type' => content_type,
-            'data'         => encode_attachment(args[:file].read)
+            'data'         => args[:file].read
           }
         end
       
     end # module ExtendedAttachments
   end
-end
+end