Update README.md

Author: liammclennan

README.md

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-> If you like JavaScript Koans you might enjoy my newer, more user friendly, project [Didacto: JavaScript](http://javascript.didacto.net/)
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 JavaScript Koans is an interactive learning environment that uses failing tests to introduce students to aspects of JavaScript in a logical sequence. 
 
 The inspiration for this project comes from the Edgecase Ruby Koans and the book 'Javascript: The Good Parts'.