make wording more precise

Author: snd

README.md

@@ -42,7 +42,9 @@ bower install react-kup
 ```
 
 [lib/react-kup.js](lib/react-kup.js) supports [AMD](http://requirejs.org/docs/whyamd.html).  
-when used in the browser and [AMD](http://requirejs.org/docs/whyamd.html) is not available it sets the global variable `reactKup`.
+it sets the global variable `reactKup` when
+neither CommonJS nor
+[AMD](http://requirejs.org/docs/whyamd.html) are available.
 
 ```coffeescript
 TodoList = React.createClass