Updated README.md for mentioning Cuis Smalltalk port.

Author: mumez

README.md

@@ -8,7 +8,8 @@ MessagePack serialization library for various Smalltalk dialects.
 - VisualWorks
 - VA Smalltalk
 - Dolphin Smalltalk
-- GNU Smalltalk (Beta)
+- GNU Smalltalk (Beta)
+- [Cuis](https://github.com/mumez/Cuis-Smalltalk-MessagePack)
 
 Sources are put as [Cypress](https://github.com/CampSmalltalk/Cypress/blob/master/README.md) for the neutral accesses from various Smalltalk dialects.