update readme

Author: tiansh

README.md

@@ -1,10 +1,11 @@
-# SimpleScrollbar
+# yaSimpleScrollbar
 
-Yet another simple vanilla javascript library for creating a custom scrollbar cross-browser and cross-devices.
+Yet Another Simple Scrollbar. A lightweight javascript library for creating customlized scrollbar.
 
 * Lightweight vanilla JavaScript
 * All native events supported, smooth and sweet
 * Perfect with dynamic content
+* Good performance, without `setInterval` trick
 
 ## Demo
 

index.html

@@ -4,7 +4,7 @@
 <meta charset="utf-8" />
 <title>yaSimpleScrollbar</title>
 <meta name="keywords" content="scrollbar, custom" />
-<meta name="description" content="Yet another simple vanilla javascript library for creating a custom scrollbar cross-browser and cross-devices." />
+<meta name="description" content="Yet Another Simple Scrollbar. A lightweight javascript library for creating customlized scrollbar." />
 <style>
   h1 { text-align: center; margin: 20px; font-size: 200%; }
   h2 { font-size: 120%; margin: 0 15px; text-align: center; }
@@ -104,4 +104,4 @@ <h1>yaSimpleScrollbar</h1>
 changeFontSize(0);
 </script>
 </body>
-</html>
+</html>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ya-simple-scrollbar",
   "version": "1.0.0",
-  "description": "Yet another simple vanilla javascript library for creating a custom scrollbar cross-browser and cross-devices.",
+  "description": "Yet Another Simple Scrollbar. A lightweight javascript library for creating customlized scrollbar.",
   "main": "ya-simple-scrollbar.js",
   "repository": {
     "type": "git",