Add shortcode

git-svn-id: https://plugins.svn.wordpress.org/instamojo/trunk@885568 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add tab for generating shortcodes

git-svn-id: https://plugins.svn.wordpress.org/instamojo/trunk@885570 b8457f37-d9ea-0310-8a92-e5e31aec5664
Change notice message style

git-svn-id: https://plugins.svn.wordpress.org/instamojo/trunk@885571 b8457f37-d9ea-0310-8a92-e5e31aec5664