Shorten description to be under 150 chars.

git-svn-id: https://plugins.svn.wordpress.org/ik-facebook/trunk@768212 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove innacurate upgrade notice.

git-svn-id: https://plugins.svn.wordpress.org/ik-facebook/trunk@768213 b8457f37-d9ea-0310-8a92-e5e31aec5664