added wpautop() function to shortcode class to check wpautop() filter priotity, and fix if necessary

git-svn-id: https://plugins.svn.wordpress.org/nextgen-facebook/trunk@783615 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme update

git-svn-id: https://plugins.svn.wordpress.org/nextgen-facebook/trunk@783740 b8457f37-d9ea-0310-8a92-e5e31aec5664