README.md in utf8_proc-0.5.2 vs README.md in utf8_proc-0.6.0

- old
+ new

@@ -26,9 +26,11 @@
 
     $ gem install utf8_proc
 
 ## Usage
 
+YARD documentation is available at [rubydoc.info](http://www.rubydoc.info/github/nomoon/utf8_proc)
+
 ```ruby
 require "utf8_proc"
 
 # Canonical Decomposition, followed by Canonical Composition
 UTF8Proc.NFC(utf8_string)