Add logging section to Readme

README.md

@@ -532,6 +532,20 @@ class User < ActiveRecord::Base
 end
 ```
 
+Logging
+----------
+
+By default Paperclip outputs logging according to your logger level. If you want to disable logging (f.ex. in test environment) add this in to your environments configuration:
+```ruby
+App.configure do
+...
+  Paperclip.options[:log] = false
+...
+end
+```
+
+More information in the [rdocs](http://rdoc.info/github/thoughtbot/paperclip/Paperclip.options)
+
 Deployment
 ----------