Second commit that includes:
* New feature: Adds the button of short code on editor of posts and pages.
* Fix Code: Fix the code to work on php 4 and 5 both.
* Add file: Add new javascript file named as 'editor_sc.js' and updated the icon image.

git-svn-id: https://plugins.svn.wordpress.org/my-custom-theme-values/trunk@982208 b8457f37-d9ea-0310-8a92-e5e31aec5664