Document change in behaviour wrt not ordering css files

readme.md

@@ -319,8 +319,8 @@ echo Casset::render_js(false, false, array(), true);
 
 When minifying CSS files, urls are rewritten to take account of the fact that your css file has effectively moved into `public/assets/cache`.
 
-With JS files, changing the order in which files were added to the group will re-generate the cache file, with the files in their new positions. However with CSS, it will not.
-This is because the order of JS files can be important, as dependancies may need to be satisfied. In CSS, no such dependancies exist.  
+With both CSS and JS files, changing the order in which files were added to the group will re-generate the cache file, with the files in their new positions.
+This is because the order of files can be important, as dependancies may need to be satisfied.
 Bear this in mind when adding files to groups dynamically -- if you're changing the order of files in an otherwise identical group, you're not allowing
 the browser to properly use its cache.