Documented new quality setting support.

Author: InfinitiesLoop

README.md

@@ -80,6 +80,14 @@ alert(jQuery.culture.name) // 'fr'
 
 In any case, if no match is found, the 'default' culture is selected.
 </p>
+<p>
+Each culture string may also follow the pattern defined in <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4">RFC2616 sec 14.4</a>. That is, a culture name may include a 'quality' value that indicates it preference.
+
+<pre>
+jQuery.preferCulture("fr;q=0.4, es;q=0.5, he");
+</pre>
+In this example, 'he' is given top priority (an unspecified quality is equal to 1). If that language is not an exact match for any of the cultures available on jQuery.cultures, then 'es' is the next highest priority with 0.5, etc. If none of these match, just like with the array syntax, the search starts over and the same rules are applied to the corresponding neutral language culture for each. If still none match, the default 'en' culture is used.
+</p>
 
 <a name="find"></a>
 <h2 id="find">jQuery.findClosestCulture</h2>