Adding link to Orion Group

git-svn-id: https://plugins.svn.wordpress.org/project-force-field/trunk@897402 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added 'tested up to' as 3.9

git-svn-id: https://plugins.svn.wordpress.org/project-force-field/trunk@897404 b8457f37-d9ea-0310-8a92-e5e31aec5664