updated readme

Author: orizens

README.md

@@ -3,4 +3,8 @@ Current html syntax highlight doesn't color html elements with "dash" in it.
 In example, the following youtube-player element will be displayed with 2 colors instead of one:
 ```html
 	<youtube-player id="#$5213123"></youtube-player>
-```
+```
+With this HTML extended package, it will color the html element properly:
+![example for web components](https://raw.github.com/orizens/html-extended/master/images/example.png)
+
+This package should work with any color scheme.