Update README.md

Author: croxton

README.md

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 ##Stash
 
-* Author: [Mark Croxton](http://hallmark-design.co.uk/)
+![Release](https://img.shields.io/badge/release-2.6.7-brightgreen.svg)
 
-### Version 2.6.7
+* Author: [Mark Croxton](http://hallmark-design.co.uk/)
 
 This is the development version of Stash. Test thoroughly before using in production.