Adds transaction plugin to Readme

Author: dresende

Readme.md

@@ -32,7 +32,7 @@ make
 - Create Model associations, find, check, create and remove
 - Define custom validations (several builtin validations, check instance properties before saving)
 - Model instance caching and integrity (table rows fetched twice are the same object, changes to one change all)
-- Plugins: [MySQL FTS](http://dresende.github.io/node-orm-mysql-fts) , [Pagination](http://dresende.github.io/node-orm-paging)
+- Plugins: [MySQL FTS](http://dresende.github.io/node-orm-mysql-fts) , [Pagination](http://dresende.github.io/node-orm-paging) , [Transaction](http://dresende.github.io/node-orm-transaction)
 
 ## Introduction