ready for release v1.3.0

* add arrow to active colum header
 * update docu

sortt.js

@@ -4,7 +4,7 @@
   @License MIT
   @Author 6543
   @Repository https://gitea.com/6543/gitea_sortt
-  @Version 1.2.1
+  @Version 1.3.0
 
 */
 
@@ -87,7 +87,7 @@ if(!window.jQuery) {
 	console.log("sortt.js: ERROR no jQuery found!");
 } else {
 
-  //use JQuery to bind event on each <th> with a "data-sortt" attribute
+  //use JQuery to go throu each table header with "data-sortt" attribute
   $('th').each(function() {
 		//if data attribute sortt is set
     if ($(this)[0].dataset.sortt) {
@@ -108,4 +108,5 @@ if(!window.jQuery) {
 			}
 		}
   });
+
 }